Do we need more crazy ideas? Conventional scientists see geoengineering as a highly dangerous response to climate change. But others say desperate times demand desperate measures.
The ‘insane’ plan to save the frozen North
Iced out: Polar bears depend on polar sea ice for their survival, as do seals, their main prey. Glossary
Arctic Circle - An imaginary line drawn around the most northern part of the world. It is one of the two very cold areas of the Earth near the poles.
Geoengineering - Deliberate attempts to intervene in the Earth's natural processes to counteract climate change on a large scale.
Algae - A simple plant that grows in or on water.