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Showing posts with label environmental. Show all posts
Showing posts with label environmental. Show all posts

Tuesday, March 26, 2013

China's Top 6 Environmental Concerns

China's environmental crises seem to arise on a scale as sweeping and epic as the vast nation itself:

Thousands of dead, bloated pigs floating down the river that supplies Shanghai with its drinking water. Air pollution in Beijing so impenetrable the U.S. Embassy's air quality measuring station can only call it "beyond index." Industrial towns where rates of cancer are so high they're known as "cancer villages."

Compounding these problems is the Chinese government's stony silence about anything that might imperil the country's economic development — including environmental regulation.

But China's increasingly restive population of 1.3 billion people is now starting to demand government action to combat the deadly plagues of pollution and disease that are stalking the 21st century's economic powerhouse. [The 10 Most Polluted Places on Earth]

Chinese officials, however, have barely started to acknowledge the problem. In the meantime, the people of China are forced to face the following environmental catastrophes on a daily basis:

Air pollution

According to the Environmental Protection Agency's air quality scale, any pollution rating above 300 means the air is unsafe to breathe. Under these conditions, people should stay indoors with an air purifier running and remain as motionless as possible, according to U.S. Embassy Beijing guidelines.

In January alone, there were 19 days when the index in Beijing surpassed that 300 threshold, according to the Washington Post, and readings above 500 are no longer unusual. On Jan. 12, the reading reached an eye-bleeding 886, comparable to living inside a smoking lounge.

Manufacturing industries and Beijing's 5 million-plus cars all contribute to the city's crippling air pollution, but most experts primarily blame the coal-burning electrical plants that power China's breakneck economic growth.

China now burns 47 percent of the world's coal, roughly equal to the amount used by all other countries of the world combined, the New York Times reports. And Beijing is surrounded by a vast network of coal-burning power plants.

But as foul as it is, Beijing's air isn't even China's worst: That dubious honor goes to Ürümqi in the country's far west, which frequently joins other Chinese cities like Lanzhou and Linfen on lists of the world's most polluted places. [Top 10 Ways to Destroy Earth]

Water pollution

Thousands of dead pigs floating past Shanghai, dramatic though they are, may be the least of China's water pollution worries.

In January, a chemical accident leaked benzene, a known cancer-causing agent, into a tributary of the Huangpu River (where the dead pigs were discovered). More than 20 people were hospitalized as a result, according to the Wall Street Journal, and area residents were forced to rely on fire trucks to deliver safe drinking water.

More than half of China's surface water is so polluted it cannot be treated to make it drinkable, the Economist reports, and one-quarter of it is so dangerous it can't even be used for industrial purposes.

Groundwater isn't any safer: About 40 percent of China's farmland relies on underground water for irrigation, and an estimated 90 percent is polluted, Reuters reports. About 60 percent of the groundwater beneath Chinese cities is described as "severely polluted" by the Economist.

Last December — shortly after his sister died of lung cancer at age 35 — businessman Jin Zengmin from Zhejiang province offered a 200,000-yuan ($32,000) reward to any local environmental official who would swim in a nearby river, where Jin once swam as a boy, Time.com reports. The river is now black with sludge from an upstream shoe factory.

His reward remains uncollected.

Desertification

China has a history of intensive agriculture going back millennia, so it's perhaps unsurprising that much of the nation's 3.7 million square-mile (9.6 million square kilometers) territory has been subject to deforestation.

Population pressure, the conversion of forests to farmland, and hydroelectric and other infrastructure projects have placed China's remaining forests at risk. This prompted the United Nations Environment Programme to list the country's forests as threatened and in need of protection.

Following closely on the heels of deforestation and agricultural development is desertification, the destruction of vegetative land cover that results in a landscape defined by bare soil and rock. About 1 million square miles (2.6 million sq km) of China is now under desertification — that's about one-quarter of the country’s total land surface, spread across 18 provinces, according to IPS News Agency.

Blinding dust storms, mud-choked rivers and eroded topsoil are often the result of desertification. Despite recent gains in reforestation and grasslands restoration, the desert continues to expand each year by about 950 square miles (2,460 sq km), according to the World Wildlife Fund (WWF). [Dry and Drying: Stark Images of Drought]

The resulting loss of arable land has created a generation of "eco-migrants," the Guardian reports, who are forced to leave their homelands, because their traditional agricultural lifestyle is no longer an option.

"We've made progress, but we face a daunting challenge," Liu Tuo, Chinese desertification control officer, told the Guardian. "It may take China 300 years."

Biodiversity

Closely related to deforestation and desertification is the issue of habitat loss and the resulting drop in biodiversity. As vast areas of forest are cleared for farmland, bamboo plantations, timber and fuel wood, endangered animals like pandas struggle to survive.

China's issues with species loss extend far beyond its borders: The slaughter of elephants for ivory, the killing of rhinos for their horns, and the culling of tigers for their bones (as medicine) and penises (as aphrodisiacs) have one primary source: the Chinese market.

Sharks are endangered worldwide, largely because of shark finning — the removal of dorsal fins from still-living sharks — for the Chinese delicacy known as shark fin soup.

Cancer villages

Perhaps no other issue underscores China's reckless disregard for environmental and public health more than the existence of "cancer villages," entire towns that have been written off as so polluted that simply living there is a cancer risk.

For years, individuals and groups have waged a desperate campaign to force the government to address — or even acknowledge — the high rates of stomach, liver, kidney and colon cancer in certain areas, usually adjacent to heavy industrial complexes, the BBC reports.

In Shangba, a city in southern Guangdong province, the river that flows through town changes from white to a startling shade of orange because of varying types of industrial effluent, Reuters reports. Many of the river's contaminants, like cadmium and zinc, are known to cause cancer.

"All the fish died, even chickens and ducks that drank from the river died. If you put your leg in the water, you'll get rashes and a terrible itch," He Shuncai, a 34-year-old farmer from Shangba, told Reuters. "Last year alone, six people in our village died from cancer and they were in their 30s and 40s."

In February of this year, a report from China's environment ministry noted that chemicals and heavy metals banned in other countries are found throughout China. The report went on to state that there are "some serious cases of health and social problems like the emergence of cancer villages in individual regions," marking the first official admission of the problem that has plagued the country for decades.

Population growth

China's "one-child" policy is universally acknowledged as having effectively kept the country's population in check. Nonetheless, China is home to about 1.3 billion people — over one-seventh of the planet's people live in the nation.

What's more of a concern to environmental advocates is the growing affluence of China's middle class, who are now adopting Western-style consumer patterns. While items like red meat, liquor and automobiles were once considered forbidden luxuries, more and more families are driving their car to a market to buy tenderloin beef, 120-proof baijiu liquor and other consumer goods.

The health risks associated with these kinds of purchases have not gone unnoticed: Binge drinking and alcohol-related hospitalizations have now reached "epidemic proportions," the Guardian reports, and the Chinese — who once enjoyed a relatively healthy diet and low rates of cancer — now dine on twice as much meat as Americans, consuming one-quarter of the world's supply, according to the Telegraph.

These consumer trends, multiplied across a large and heavily populated country, have a global reach that affects everything from sugar prices in Europe to climate change in Greenland: Most climate experts agree that China's industrial growth, and its dependence on coal-burning, are significant drivers of climate change, Scientific American reports.

Can China change course?

While China's traditionally obdurate government hierarchy has seemed to value economic development at any cost, including the health of its citizens and wholesale eco-destruction, there are signs of a thaw in the icy silence that shrouds much environmental action in the country.

The government's recent admission that cancer villages exist "shows that the environment ministry has acknowledged that pollution has led to people getting cancer," environmental lawyer Wang Canfa told Agence Frence-Presse. "It shows that this issue, of environmental pollution leading to health damages, has drawn attention."

Coupled with the public outcry over the thick blanket of toxic smog that covered Beijing earlier this year, there are glimmers of hope that the Chinese people may succeed in wresting some measure of control over their environment — and their lives — back from government and industry leaders.

Whether they will succeed remains to be seen.

Email Marc Lallanilla or follow him @MarcLallanilla. Follow LiveScience on Twitter @livescience. We're also on Facebook & Google+. Original article on LiveScience.com.

Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

View the original article here

Wednesday, June 29, 2011

Roundup resistant weeds pose environmental threat

By David Mercer, Associated Press CHAMPAIGN, Ill. — When the weed killer Roundup was introduced in the 1970s, it proved it could kill nearly any plant while still being safer than many other herbicides, and it allowed farmers to give up harsher chemicals and reduce tilling that can contribute to erosion.But 24 years later, a few sturdy species of weed resistant to Roundup have evolved, forcing farmers to return to some of the less environmentally safe practices they abandoned decades ago.

The situation is the worst in the South, where some farmers now walk fields with hoes, killing weeds in a way their great-grandfathers were happy to leave behind.

And the problem is spreading quickly across the Corn Belt and beyond, with Roundup now proving unreliable in killing at least 10 weed species in at least 22 states.

Some species, like Palmer amaranth in Arkansas and water hemp and marestail in Illinois, grow fast and big, producing tens of thousands of seeds.

"It's getting to be a big deal," said Mike Plumer, a 61-year-old farmer and University of Illinois agronomist who grows soybeans and cotton near the southern Illinois community of Creal Springs. "If you've got it, it's a real big deal."

When Monsanto introduced Roundup in 1976, "it was like the best thing since sliced bread," said Garry Niemeyer, who grows corn and soybeans near Auburn in central Illinois.

The weed killer, known generically as glyphosate, is absorbed through plants' leaves and kills them by blocking the production of proteins they need to grow.

The U.S. Environmental Protection Agency considers it to have little toxicity to people and animals, and aside from the plants it's sprayed on, it's less of a threat to the environment because it quickly binds to soil and becomes inactive.

Monsanto's introduction of seeds designed to survive Roundup made things even better for farmers because they could spray it on emerging crops to wipe out the weeds growing alongside them.

Seeds containing Monsanto's Roundup Ready traits are now used to grow about 90% of the nation's soybeans and 70% of its corn and cotton.

With increased reliance on Roundup, herbicide use on corn decreased from 2.76 pounds an acre in 1994 to 2.06 in 2005, the most recent year for which the U.S. Department of Agriculture has data.

Spread that out over the 81.8 million acres planted in 2005, and it's a decrease of more than 57 million pounds of herbicides annually.

Farmers also found they could cut back, or in some cases eliminate tilling, reducing erosion and fuel use.

But with any herbicide, the more it's used, the more likely it'll run into individual plants within a species that have just enough genetic variation to survive what kills most of their relatives. With each generation, the survivors represent a larger percentage of the species.

St. Louis-based Monsanto maintains the resistance is often overstated, noting that most weeds show no sign of immunity.

"We believe that glyphosate will remain an important tool in the farmers' arsenal," Monsanto spokesman John Combest said.

That said, the company has started paying cotton farmers $12 an acre to cover the cost of other herbicides to use alongside Roundup to boost its effectiveness.

The trend has confirmed some food safety groups' belief that biotechnology won't reduce the use of chemicals in the long run.

"That's being reversed," said Bill Freese, a chemist with the Washington, D.C.-based Center For Food Safety, which promotes organic agriculture. "They're going to dramatically increase use of those chemicals, and that's bad news."

The first weeds in the U.S. that survived Roundup were found about 10 years ago in Delaware.

Agricultural experts said the use of other chemicals is already creeping up. Monsanto and other companies are developing new seeds designed to resist older herbicides like dicamba and 2,4-D, a weed killer developed during World War II and an ingredient in Agent Orange, which was used to destroy jungle foliage during the Vietnam War and is blamed for health problems among veterans.

Penn State University weed scientist David Mortensen estimates that in three or four years, farmers' use of dicamba and 2,4-D will increase by 55.1 million pounds a year because of resistance to Roundup. That would push both far up the list of herbicides heavily used by farmers.

Dicamba and 2,4-D both easily drift beyond the areas where they're sprayed, making them a threat to neighboring crops and wild plants, Mortensen said. That, in turn, could also threaten wildlife.

"We're finding that the (wild) plants that grow on the field edges actually support beneficial insects, like bees," he said.

In Australia, weed scientist Stephen Powles has been a sort of evangelist for saving Roundup, calling it a near-miraculous farming tool.

Australia has been dealing with Roundup-resistant weeds since the mid 1990s, but changes in farming practices have helped keep it effective, Powers said. That has included using a broader array of herbicides to kill off Roundup resistant weeds and employing other methods of weed control.

Those alternative methods, such as planting so-called cover crops like rye to hold back weeds during the winter and other times when fields aren't planted with corn, soybeans or cotton, are the key, said Freese, the Center For Food Safety chemist.

Otherwise, he said, "We're talking a pesticide treadmill here. It's just coming back to kick us in the butt now with resistant weeds."

Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Guidelines: You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference. Read more.

View the original article here

Wednesday, June 8, 2011

Roundup resistant weeds pose environmental threat

By David Mercer, Associated Press CHAMPAIGN, Ill. — When the weed killer Roundup was introduced in the 1970s, it proved it could kill nearly any plant while still being safer than many other herbicides, and it allowed farmers to give up harsher chemicals and reduce tilling that can contribute to erosion.But 24 years later, a few sturdy species of weed resistant to Roundup have evolved, forcing farmers to return to some of the less environmentally safe practices they abandoned decades ago.

The situation is the worst in the South, where some farmers now walk fields with hoes, killing weeds in a way their great-grandfathers were happy to leave behind.

And the problem is spreading quickly across the Corn Belt and beyond, with Roundup now proving unreliable in killing at least 10 weed species in at least 22 states.

Some species, like Palmer amaranth in Arkansas and water hemp and marestail in Illinois, grow fast and big, producing tens of thousands of seeds.

"It's getting to be a big deal," said Mike Plumer, a 61-year-old farmer and University of Illinois agronomist who grows soybeans and cotton near the southern Illinois community of Creal Springs. "If you've got it, it's a real big deal."

When Monsanto introduced Roundup in 1976, "it was like the best thing since sliced bread," said Garry Niemeyer, who grows corn and soybeans near Auburn in central Illinois.

The weed killer, known generically as glyphosate, is absorbed through plants' leaves and kills them by blocking the production of proteins they need to grow.

The U.S. Environmental Protection Agency considers it to have little toxicity to people and animals, and aside from the plants it's sprayed on, it's less of a threat to the environment because it quickly binds to soil and becomes inactive.

Monsanto's introduction of seeds designed to survive Roundup made things even better for farmers because they could spray it on emerging crops to wipe out the weeds growing alongside them.

Seeds containing Monsanto's Roundup Ready traits are now used to grow about 90% of the nation's soybeans and 70% of its corn and cotton.

With increased reliance on Roundup, herbicide use on corn decreased from 2.76 pounds an acre in 1994 to 2.06 in 2005, the most recent year for which the U.S. Department of Agriculture has data.

Spread that out over the 81.8 million acres planted in 2005, and it's a decrease of more than 57 million pounds of herbicides annually.

Farmers also found they could cut back, or in some cases eliminate tilling, reducing erosion and fuel use.

But with any herbicide, the more it's used, the more likely it'll run into individual plants within a species that have just enough genetic variation to survive what kills most of their relatives. With each generation, the survivors represent a larger percentage of the species.

St. Louis-based Monsanto maintains the resistance is often overstated, noting that most weeds show no sign of immunity.

"We believe that glyphosate will remain an important tool in the farmers' arsenal," Monsanto spokesman John Combest said.

That said, the company has started paying cotton farmers $12 an acre to cover the cost of other herbicides to use alongside Roundup to boost its effectiveness.

The trend has confirmed some food safety groups' belief that biotechnology won't reduce the use of chemicals in the long run.

"That's being reversed," said Bill Freese, a chemist with the Washington, D.C.-based Center For Food Safety, which promotes organic agriculture. "They're going to dramatically increase use of those chemicals, and that's bad news."

The first weeds in the U.S. that survived Roundup were found about 10 years ago in Delaware.

Agricultural experts said the use of other chemicals is already creeping up. Monsanto and other companies are developing new seeds designed to resist older herbicides like dicamba and 2,4-D, a weed killer developed during World War II and an ingredient in Agent Orange, which was used to destroy jungle foliage during the Vietnam War and is blamed for health problems among veterans.

Penn State University weed scientist David Mortensen estimates that in three or four years, farmers' use of dicamba and 2,4-D will increase by 55.1 million pounds a year because of resistance to Roundup. That would push both far up the list of herbicides heavily used by farmers.

Dicamba and 2,4-D both easily drift beyond the areas where they're sprayed, making them a threat to neighboring crops and wild plants, Mortensen said. That, in turn, could also threaten wildlife.

"We're finding that the (wild) plants that grow on the field edges actually support beneficial insects, like bees," he said.

In Australia, weed scientist Stephen Powles has been a sort of evangelist for saving Roundup, calling it a near-miraculous farming tool.

Australia has been dealing with Roundup-resistant weeds since the mid 1990s, but changes in farming practices have helped keep it effective, Powers said. That has included using a broader array of herbicides to kill off Roundup resistant weeds and employing other methods of weed control.

Those alternative methods, such as planting so-called cover crops like rye to hold back weeds during the winter and other times when fields aren't planted with corn, soybeans or cotton, are the key, said Freese, the Center For Food Safety chemist.

Otherwise, he said, "We're talking a pesticide treadmill here. It's just coming back to kick us in the butt now with resistant weeds."

Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Guidelines: You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference. Read more.

View the original article here