This video discusses how scientists have tracked what, when, and how contaminants may reach public-supply wells in four aquifers in California, Connecticut, Nebraska, and Florida.

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In this video, The Times's Jim Yardley tours the Yellow River, witnessing China's rampant pollution, booming urbanization and uncertain future.

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The overwhelming scale of the spill in the gulf is taxing the available supply of protective boom. Pete Parker, an oil spill expert, patches up urgently needed used boom to continue fighting the spill.

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This video shows how Agent Orange (nearly 20 million gallons of defoliant) left negative effects in a central highland of Vietnam. The most toxic component: dioxin, has been accumulated in the food chain of this area because dioxin is fat soluble. The botanist Phung Tuu Boi tried to build up "green fence" to protect people and their life-stocks entering the hot zones of dioxin, but failed because...

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Recently, the Environmental Protection Agency (EPA) released the 2000 Toxic Release Inventory (TRI) Data online. The report "is a publicly available database that contains information on toxic chemical releases and other waste management activities reported annually by certain covered industries as well as by federal facilities." The report can be downloaded or viewed online, as well as searched...

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