Discovery: Geoengineering the Planet

How geoengineering is already underway, as scientists try to save places threatened by global heating. In Australia, they are brightening clouds to make them more reflective, hoping to save the Great Barrier Reef, and coating the waters with a thin reflective film. In the Arctic, glaciers are being covered with fine glass beads to reflect the sun's heat and slow melting. On the Asian plains, clouds are being seeded to deliver rain over droughtlands. Beaches are being coated with rock dust to try to `react out" the air's CO2, and where coral reefs have already been destroyed by bleaching, scientists are creating artificial coral structures inhabited by genetically modified coral organisms