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The 26-year-old climate activist from Kenya founded the Green Generation Initiative, a group that helps young people become environmentally conscious through growing trees.

Arctic communities have long been plagued by soot that drives snow melt and respiratory disease. Now, humans are making their mark in Antarctica.

Corn sweat is real. Corn draws in water, then releases it into the air through evaporation. And all that moisture produced by more than 90 million acres of corn nationwide can make it more humid.

Many large businesses accept climate change. That creates another challenge: a split with many Republican allies in Congress who are still fighting the debate over climate science.

Hillary Clinton and Donald Trump had strong Super Tuesday showings, but their rivals didn't let up. Bernie Sanders won 4 states. Ted Cruz captured three. And, Marco Rubio won the Minnesota caucuses.

It's March Mammal Madness, a bracket with real animals facing off in fictional battles. Hundreds of science classes are playing in schools around the country.

Seeking to cut greenhouse gas emissions dramatically by 2030, regulators approved a plan that offers incentives for truck and bus fleets to go green and for utilities to use more renewable energy.

Many organic tomatoes or peppers are grown in greenhouses, where they get nutrients from water. Critics say that violates the spirit of "organic." A bid to strip them of the label failed this week.

Former Department of Energy photographer Simon Edelman is filing a federal whistleblower suit after he leaked the photos of a private meeting between the energy secretary and Robert Murray.

NPR's Scott Simon speaks with former Environmental Protection Agency administrator, Gina McCarthy, about what she thinks President-elect Joe Biden can do to address climate change once he's sworn in.