News: Repost Compost for Earth Day

ScienceBlogs has an article mentioning: "... What if we could some how use the rotational energy of the Earth? How much would we have to slow it down to get something useful? Solar Powered motorcycle - possible? There was this story about an electric motorcycle that is recharged by solar cells. How far could you go in a day with this? (spreadsheet ..."

Posted by Photonic News