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Let me guess how you feel about your urine: Get that smelly stuff away from me as fast as possible?

A small group of environmentalists in Vermont isn't as squeamish. Instead of flushing their pee down the drain, they're collecting it with special toilets that separate No. 1 and No. 2.

Then they're pooling the urine of the 170 volunteers in the pilot project (a quart or so, per person, daily) and eventually giving it to a farmer, who's putting it on her hay fields in place of synthetic fertilizer. The goal is to collect 6,000 gallons this year.

Copyright 2014 NPR. To see more, visit http://www.npr.org/.

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LINDA WERTHEIMER, HOST:

Copyright 2014 NPR. To see more, visit http://www.npr.org/.

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RENEE MONTAGNE, HOST:

Another battle is brewing over water in the West that could put farmers against city and suburb dwellers.

LINDA WERTHEIMER, HOST:

For the average school kid, weighty, wonky topics like conservation, climate change and the circular economy might sound off-putting, if not downright dull. Yet Christiane Dorion has sold millions of children's books about these very concepts.

The trick? She never mentions them. "You can teach anything to children if you pitch it at the right level and use the right words," said the U.K.-based author.

In a windowless laboratory in downtown Baltimore, some tiny, translucent fish larvae are swimming about in glass-walled tanks.

They are infant bluefin tuna. Scientists in this laboratory are trying to grasp what they call the holy grail of aquaculture: raising this powerful fish, so prized by sushi lovers, entirely in captivity. But the effort is fraught with challenges.

Small fatty fish like mackerel, herring, sardines and anchovies are high in omega-3s, vitamin D and low on the food chain.

A class of insecticides called neonicotinoids, which are used on a lot of big corn and soybean fields, has been getting a pretty bad rap lately.

In a report issued Tuesday, the White House warned that the cost of inaction when it comes to climate change outweighs the cost of implementing more-stringent regulations on greenhouse gas emissions.

Here's how Time boils down the White House's argument:

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And now a story about an extremely rare albino tree. If you pass it on the street, it might look dead. It's not dead. It was almost killed. But now it's going to survive thanks, in part, to this guy.

This is a trick question. Where would you expect to find the greatest variety of birds?

Downtown, in a city?

Or far, far from downtown — in the fields, forests, mountains, where people are scarce?

Or in the suburbs? In backyards, lawns, parking lots and playing fields?

Not the city, right?

When scientists talk about the destruction of rain forests or the acidification of oceans, we often hear about the tragic loss of plants and animals.

But ecologists at the University of California, Berkeley say there's also a human tragedy that frequently goes unnoticed: As fish and fauna are wiped out, more children around the world are forced to work, and more people are forced into indentured servitude, scientists wrote Thursday in the journal Science.

Outside the northern Guatemalan town of Olopa, near the Honduran border, farmer Edwin Fernando Diaz Viera stands in the middle of his tiny coffee field. He says it was his lifelong dream to own a farm here. The area is renowned for producing some of the world's richest arabica, the smooth-tasting beans beloved by specialty coffee brewers.

"My farm was beautiful; it was big," he says.

But then, a plant fungus called coffee rust, or roya in Spanish, hit his crop.

"Coffee rust appeared and wiped out everything," he says.

An intrepid bird called the red knot migrates from the southern tip of South America to the Arctic and back every year. But changes in climate along its route are putting this ultramarathoner at risk.

Copyright 2014 NPR. To see more, visit http://www.npr.org/.

Like it or not, plastic packaging has become an ingrained part of the food system.

While it's clearly wasteful to buy salad, sandwiches and chips encased in plastic and then promptly throw that plastic away, we take for granted how it keeps so much of what we eat fresh and portable.

And behind many of those packages that allow us to eat on the go or savor perishable cookies or fish imported from the other side of the globe is a whole lot of science and innovation.

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