30 July 2010
photo: jurveston via flickr
Algae biofuels are probably the most touted future hope to replace large amounts of petroleum-based liquid fuels with a renewable source. However, a new study in Energy and Fuels shows that when you grow that algae in bioreactors made up of clear tubes, so much energy is required that the carbon footprint of the biofuel is o... Read the full story on TreeHugger
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Nissan Leaf battery. Photo: Nissan
Matching the Chevy Volt
As 
Photo: Michael Graham Richard
The Little Car that Could
The Toyota Prius hybrid has been sold in the U.S. for 10 years (even longer in Japan, where it was first introduced in 1997), and during that decade this car went from a small niche player considered 'weird' by most people (I remember back when the #1 question was "do you have to plug it in?") to a best-seller halo car whose technology has found its way in many other models, including vehicles made by Toyota's competitors. During that decade in the U.S., Toyota has sold about 900,000 Prius hybrids there, and about 1.8 million w... 
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Soot from vehicle exhaust, power generation and burning biomass is the second most important contributor to global warming. Photo: