WHAT'S INSIDE: GREEN TECHNOLOGY
- Energy Production Technologies
- Remediation Technologies
- Sustainable Technologies
Cellulosic ethanol can be made from any old stem, leaf or tree trunk. Farm wastes, grass clippings and recycled newspaper will work, too. So when can we expect this alternative fuel to arrive at gas stations?
There's nothing particularly organic about a robot, even if you dress it in hemp and fuel it with alternative energy. But these five can help our planet one mechanical movement at a time.