Who doesn’t love a freebie? You — after you read this post and learn how you can live lighter and greener by just saying no.

These incredible pups catch poachers, sniff out invasive plants and diseases, and more, thanks to the work of wildlife biologist and conservation-dog expert Megan Parker.

Why learn about methane? Because it could be our chance to make a real dent in global warming, says environmentalist Fred Krupp.

You can — at a visionary social enterprise called Plastic Bank, which is not only improving people’s lives but keeping junk from going into the ocean.

Some argue that we have a moral responsibility for future generations, but others ask: how do we know what they would want? Writer Charles Mann explores the confusing ethics of acting on global warming.

The old take-make-use-lose model of industrial design has depleted resources and dumped waste into the environment. By taking nature as our model and mentor, we can transform manufacturing — and the earth, says economist Kate Raworth.

Inspired by one of nature’s most efficient swimmers, bio-roboticist Auke Ijspeert and his team are building a sinuous robot that can venture into toxic waters.