"Hey! Trade in your old, soot-spewing car for a newer one. Free." The latest scam? Not according to a former vice chair of the Federal Reserve
Slowing the rise in human numbers is essential for the planet--but it doesn't require population control
Forward-thinking companies, universities and municipalities are finding creative ways to run on renewable power
Lester Brown, at times ridiculed, has been warning the world for 40 years about coalescing energy, food and population crises. So why is he optimistic now?
Scientists and policymakers should focus more on how local communities can adapt to climate change
Extracting carbon dioxide from power plant exhaust and storing it underground may be the only hope to avoid a climate change catastrophe caused by burning fossil fuels
The melting Arctic is releasing vast quantities of methane. How big is this greenhouse threat? What can be done?
It's not just for tiki torches anymore, but does this wood substitute really make for greener floors, clothing and other products?
Deadline: Jul 25 2013
This challenge provides an opportunity for Solvers to build a web-based or mobile “app” to explore data relationships in scholarly conte
Deadline: Jul 30 2013
Reward: $100,000 USD
The Seeker desires a method for producing pseudoephedrine products in such a way that it will be extremely difficult for clandestine che
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