This month, GreenTechMedia highlighted obsolete greentech concepts that are making a go of it…again.
In this really cool list, GreenTechMedia features sixteen ideas that are centuries old, but are experiencing a re-birth in today’s green technology startups. The old-school concepts include:
1. Mashed Earth (www.integrityblock.com)
2. Solar-Thermal Water Heaters (www.mondial-energy.com )
3. Solar Lighting (www.sunlight-direct.com )
4. The Opposed Piston/Opposed Cylinder Engine (www.achatespower.com , [...]
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