Denmark supplies three out of four of the world's offshore wind turbines, and it's on track to be free of fossil fuels by 2050.
Find out if you're spending too much money on hot showers.
Caffeine won't be the only reason you love coffee. Arthur Kay and his team at Bio Bean have developed the technology to convert coffee grounds into a uniquely sustainable, clean source of renewable energy.
Domingo Reyes-Gastelum on construction work in the California desert and how his work on solar projects could help his asthma.
In some Southern states, leasing rooftop solar panels is illegal, energy efficiency is a novel concept, and the governor lobbies for the local coal-friendly utility. How does the South get to clean power from there?
Instead of filling our landfills with toxic animal poop, these innovative solutions might be another way to deal with the grubby facts of life.