Spinning CDs to clean sewage water

Spinning CDs to clean sewage water
Napster founders launch ‘clean’ video chat service

Napster founders launch 'clean' video chat service
MIT fog collector provides clean water from thin air

MIT fog collector provides clean water from thin air
Ecofriendly method extracts oil from sand

Ecofriendly method extracts oil from sand
This electric quad is clean and green

This electric quad is clean and green
Paving slabs clean the air

Paving slabs clean the air
Kevin Costner dances with oil spills

Kevin Costner dances with oil spills