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The Drinkable Book has water filters in each page. Tear out a page, pour dirty water over it and bacteria will be killed. But is this the best way to clean up the developing world's water supply?

Biofuel producers are teaming up with farms, meatpackers and waste management companies to tap the gassy waste on farms to make renewable jet fuel and diesel for vehicles.

The conventional wisdom is that city life makes you fat and rural life keeps you trim. A new study looks at the numbers to see if that holds true.

The blast was felt more than 30 miles away, knocking homes off their foundations and casting debris about half a mile. A criminal probe is underway, though it's not clear what caused the explosion.

Elephants, snakes and crocodiles? Researchers around the globe faced risky situations to gather wild relatives of key foods. That genetic pool could be vital to helping crops adapt to climate change.

Montana property owners are suing BP to clean up arsenic pollution left over from mining. The case is now before the U.S. Supreme Court, and businesses worry it could open them up to huge new costs.

"They are some of the very biggest companies in the fossil fuel industry. That industry knowingly exacerbated climate change," de Blasio tells Here & Now's Meghna Chakrabarti.

Could smoke carry disease-causing microorganisms? "It's a very new idea to think of smoke as having a living component," says Leda Kobziar, co-author of an article that explores this theory.

Congress has long struggled to pass new laws addressing climate change, even ones with bipartisan support. But the end-of-year spending package includes an energy bill with major climate measures.

Tens of thousands of fires have erupted in the Amazon so far this year — a huge spike over 2018 — and critics blame Bolsonaro's policies. He said Friday that protecting the rainforest is "our duty."