Environment

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How does a country bring its people into the 21st century without pumping huge amounts of carbon into the atmosphere? This challenge is more acute in India than anywhere else. Though India already has the third-largest carbon footprint in the world, around 400 million people still don't have access to reliable electricity.

Just a few months ago, the price of a barrel of crude oil reached a 30-year low. That price has inched up since then, but still, it remains 60 percent lower than it was in the summer of 2014.

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Editor's Note: This story has been updated to reflect Strava's latest figures for the number of GPS-tracked activities uploaded to its database.

Cyclists often find themselves pedaling between huge trucks and speeding cars or stranded when protected bike lanes abruptly end at busy intersections.

Chris Cassidy moved to San Francisco in 2005. He used to cycle through Market Street, a busy downtown thoroughfare.

Deep in the ocean, a mission is underway to explore the "unknown and poorly known areas" around the Mariana Trench.

Part 6 of the TED Radio Hour episode The Case For Optimism

About Al Gore's TED Talk

Vice President Al Gore explains how human ingenuity can solve our climate crisis.

About Al Gore

Part 1 of the TED Radio Hour episode The Case For Optimism

About Al Gore's TED Talk

Vice President Al Gore says that — despite the dismal news on climate change — he's optimistic.

About Al Gore

Scientists have had a literal breakthrough off the coast of Mexico.

After weeks of drilling from an offshore platform in the Gulf of Mexico, they have reached rocks left over from the day the Earth was hit by a killer asteroid.

Susan Bence

Inland fishing season opens Saturday.

Thirty years ago, Eagle Lake would not have been a popular angler destination.  The rural Racine County lake was dominated by common carp. The fish is not native to North American waters, but has been around a long time.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Let's say you're an environmentally motivated eater. You want your diet to do as little damage as possible to our planet's forests and grasslands and wildlife.

But how do you decide which food is greener?

Take one example: sugar. About half of America's sugar comes from sugar cane, and half from sugar beets. They grow in completely different climates. Sugar cane is a tropical crop, and sugar beets grow where it's colder and dryer.

Each one has an impact on the environment — sometimes a dramatic impact — but in very different ways.

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"I will not rest, and I'm going to make sure that the leaders at every level of government don't rest until every drop of water that flows to your homes is safe to drink, and safe to cook with, and safe to bathe in," President Obama told an energetic audience in Flint, Mich. "Because that's part of the basic responsibilities of a government in the United States of America."

The population of northern Colorado is booming, and we're not just talking about people here.

The number of dairy cows is now higher than ever.

At the northern edge of the state, Weld and Larimer counties are already home to high numbers of beef and dairy cattle, buttressed by the region's numerous feedlots, which send the animals to several nearby slaughterhouses. But an expansion of a cheese factory owned by dairy giant Leprino Foods will require even more cows.

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