And if plant life really does hold the building blocks for renewable fuels, it would seem that we are literally surrounded by potential energy sources everywhere green grows. (sciencedaily.com)
To figure out how humans might be able to survive on the distant moon far in the future, Amanda Hendrix of the Planetary Science Institute and Yuk Yung at the California Institute of Technology analysed potential energy sources. (newscientist.com)
That's why we shouldn't «count» on it, and that's also why we should be exploring the other potential energy sources, fast, including (and perhaps especially) solar energy. (dotearth.blogs.nytimes.com)