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Pablo Fajardo is the David to the oil Goliath Chevron Texaco. He represents about 30,000 Ecuadorians in a class action suit trying to clean up the oily mess in their part of the Amazon. The case, filed in 1993, goes back as far as 1964, when the U.S. company Texaco began oil exploration there. The suit alleges that Texaco dumped 18.5 billion gallons of 'produced water' -- which can contain dissolved inorganic salts, dispersed oil droplets and dissolved oil; treatment and workover chemicals; dissolved gases, particularly hydrogen sulfide and carbon dioxide; and bacteria and other living organisms.

"Man made levees line the banks of the Mississippi River and its tributaries. They protect towns and they allow farmers to plow the bottomlands. But levees come at a price: habitat destruction and worse flooding downstream. Now, more people are calling for taking down levees and returning floodplain areas to their natural state."

One resident says the Little Pee Dee River is unsafe for swimming because of fecal coliform bacteria from hog farming.

"CORPUS CHRISTI -- A fire last month at a local Citgo refinery has focused attention on what is likely the most dangerous chemical used in the refining process."

"As the hot days in Texas get even hotter, it may just be too much for some birds and fish. From the American goldfinch to the gray snapper, some species have been moving north for years, searching for cooler ground. And their quest may someday lead them to migrate out of the state -- forever -- especially if climate change continues to make Texas warmer, as predicted."

"Eighteen cattle likely died of selenium poisoning near a southeastern Idaho phosphate mine, the latest livestock deaths in a region rich in phosphates where a legacy of pollution has killed horses and hundreds of sheep since the 1990s."

"As fears were growing about the link between hormone therapy and breast cancer, a drug company paid the University of Wisconsin to sponsor ghostwritten medical education articles that downplayed the risks, records obtained by the Journal Sentinel show."

"A Vernon parent is wondering why school playing fields are still being sprayed with pesticides as communities across the country have discontinued using chemicals to control weeds."

"SEATTLE - Leaders of this famously green city last year passed the nation's first grocery-bag fee, and other cities around the nation quickly followed. But the plastics industry has been fighting back, bringing lawsuits, aggressively lobbying lawmakers, and bankrolling a referendum in Seattle that aims to overturn the 20-cent charge. The measure goes before voters Tuesday."

Firefighters have largely contained many of the major fires that forced thousands of residents in various parts of California to flee their homes. Some are already returning.