One Million Lights trades kerosene for solar in developing countries

For kids in developing countries, it’s crucial to have a reliable light source — otherwise you can’t see to read or do your homework. But many homes and villages don’t have electric light, and the cheapest alternative — kerosene — …


Map shows avalanche of cellulosic ethanol projects on the way

In the battle between food and fuel, cellulosic ethanol might not be a great idea or even a viable solution to our energy woes, but enzyme company Novozymes says it's coming, regardless.

Business & Technology

In Germany, solar will be as cheap as conventional electricity by 2013

"Grid parity" has arrived in parts of sunny California and Hawaii, and it's coming to (not-so-sunny) Germany by 2013.

Business & Technology

Kazakhstan, Mongolia to rescue us from China’s rare earths monopoly

Germany just signed agreements with Kazakhstan and Mongolia to mine rare earths in those countries, in an effort to break China's monopoly over these 17 elements.

Business & Technology

Sales of residential solar in Japan explode like reactor #4

Sales of solar panels for Japanese homes are up 30.7 percent in 2011, despite -- or, let's be real, because of -- the economic hit the country took in the wake of the Fukushima disaster.

Urban Agriculture

Sweden builds 18-story greenhouse

Swedish company Plantagon International is taking the urban greenhouse to the next level, and then the 17 levels beyond that. Their new vertical greenhouse in Linköping, Sweden will be 177 feet high.

Business & Technology

How 1.6 billion people who live on less than a dollar a day afford renewables

If you're not already connected to an electricity grid, renewable energy is a no-brainer, argues Michigan professor of history and ‘scholar of the Muslim world’ Juan Cole.

Business & Technology

NASA is developing green rocket fuel

Hydrazine propellant is super toxic and dangerously unstable, so NASA is going to spend up to $50 million apiece to test alternatives.


Why buildings haven’t gotten more efficient in 20 years

Everything single part of a building has become significantly more energy efficient over the past 20 years, yet buildings are using the same amount of energy they always have. Why?