With Earth Day upon us again, CNET News.com green reporters sat down and selected five leading companies in five different clean technology categories. Here are the ones to watch in the recycling realm:
1. GreenFuel Technologies: Large oil companies and many academics favor capturing carbon dioxide, turning it into a liquid, and storing it underground. Politically, though, that's a tough sell.
GreenFuel, with a pedigree from Harvard and the Massachusetts Institute of Technology and millions in venture funding, wants to feed captured carbon dioxide to algae, and then turn the algae into biofuel. The company is still fine-tuning … Read more