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More Americans are breathing unhealthy air, even though overall air pollution has decreased in recent decades. In the tug-of-war between air regulations and climate change, global warming is winning.

Meteorologist Eric Holthaus has made his career monitoring the Earth's climate, and he's alarmed at what he sees. After reading a new, bleak international report on climate change, Holthaus has decided one important way to reduce his carbon footprint is to give up airplane travel for good.

Climate change is transforming the Arctic, and putting indigenous communities in Alaska at risk.

It has been a common belief that low-emissions vehicles, like hybrids and electric cars, are more expensive than other choices. But researchers at MIT have found otherwise.

Kernza is seed grain scientists have been selectively breeding, hoping to develop into a food crop that's more climate friendly than wheat and corn. Liquor distillers are interested.

Scientists are predicting that average sea levels could rise as much as 3 feet by the end of the century. However, the country's deep religious beliefs have residents of the tiny island nation in the Pacific Ocean torn between God and science.

Despite the cascade of other crises this year, climate change has emerged as a key election issue. The two major-party presidential candidates' positions on it could not be more different.

Australia's newly elected Prime Minister Kevin Rudd is in Bali, Indonesia, for the U.N. Conference on Climate Change. Rudd is a strong supporter of addressing climate change, a stance that helped him get elected to office.

U.S. climate envoy John Kerry is visiting China to re-establish climate change discussions between the world's two biggest economies.

Portland, Oregon, will fund clean energy in communities that are most vulnerable to the impacts of climate change. That's an idea that's part of President-elect Joe Biden's sweeping climate plan.