Go Bluebird

Solutions for the Planet: Cloud-brightening Yachts

Rising sea levels threaten our life on this planet, but the sea itself could hold the answer to our problems. In this remarkable experiment, futuristic yachts atomize the oceans and spray the clouds to make them denser and more reflective. Brighter clouds would help us combat global warming.

This video from the BBC's Five Ways to Save The World series

Solutions for the Planet: Sulphates in the Stratosphere

The Clean Air Acts designed to filter sulphates out of our immediate environment have had an ironic effect - they've accelerated the earth's warming. But what if sulphates could be taken high enough into the stratosphere - perhaps with rockets - to form a protective shield around our planet? Cutting-edge science could make the idea a reality. 

This video from the BBC's Five Ways to Save The World series

Solutions for the Planet: Mirrors in Space

The pace of climate change is outstripping conventional responses. The time has come for visionary thinking to save our beleaguered planet. Dr Roger Angel proposes firing trillions of mirrors into space to deflect solar rays, forming a 'sun shade' for the earth.