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It sounds like something out of Dr. Seuss, but artist Sam Van Aken is developing a tree that blooms in pink, fuchsia, purple and red in the spring — and that is capable of bearing 40 different kinds of fruit.

Sometimes the quiet ones surprise us.

Take moss — those fuzzy green pads you see on the sides of old trees, or hanging onto rocks. Who notices moss? It's just ... there, doing whatever it does — so slowly, so terribly slowly, that nobody bothers to think about it. Moss creeps up tree bark, sits quietly on crevasses in rocks. Moss is an old, old life form, one of the earliest plants to attach to land around 450 million years ago. It's very patient, very modest — but when you look closely, you discover it has super powers.

Pow! Crunch! Zap!

The coal industry made its presence known in Pittsburgh this week for public hearings on President Obama's controversial plan to address climate change. A key element is rules the Environmental Protection Agency proposed in June. They would cut greenhouse gas emissions — chiefly carbon dioxide — from existing power plants. The national goal is 30 percent by 2030, based on 2005 levels.

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.

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

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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.

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