Mark Zondlo, an associate professor of civil and environmental engineering at Princeton University and its Andlinger Center for Energy and the Environment, develops tools to measure air pollution in more sophisticated and nimble ways than previously possible.

His specially engineered laser sensors and drones help reveal the impact of greenhouse gases and air pollutants on the climate, where pollutants come from, and how clouds of air pollution — such as smog — form. The ultimate goal is to inform policy that will clear the air and our lungs and slash air pollution’s staggering impact on human mortality. Severe air pollution causes the premature death worldwide of more than 5.5 million people per year, according to news reports based on data compiled for the Global Burden of Disease project.

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It was once one of Europe’s largest coal-burning power stations. Now, after replacing coal in its boilers with wood pellets shipped from the U.S. South, the Drax Power Station in Britain claims to be the largest carbon-saving project in Europe. About 23 million tons of carbon dioxide goes up its stacks each year. But because new trees will be planted in the cut forests, the company says the Drax plant is carbon-neutral.

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A University of Victoria molecular biologist has gained new insights into how environmental contaminants may disrupt thyroid systems, discovered while assembling the genome of the North American bullfrog.

Caren Helbing’s findings could help explain the mechanisms of early development and metamorphosis, as well as how environmental contaminants cause thyroid-related diseases and malfunctions.

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Recent stories in the national media are magnifying fears of a catastrophic eruption of the Yellowstone volcanic area, but scientists remain uncertain about the likelihood of such an event. To better understand the region’s subsurface geology, University of Illinois geologists have rewound and played back a portion of its geologic history, finding that Yellowstone volcanism is far more complex and dynamic than previously thought.

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