Telegraph: Lord Rees, the Astronomer Royal, claims that launching mirrors into space, triggering algal blooms in the oceans and seeding clouds are just some of "Plan B" schemes which will have to be considered by world leaders unless carbon emissions can be cut in the next 20 years.
He is due to tell the British Scientist Festival in Newcastle that although it is an "utter political nightmare' because "not all nations would want to adjust the thermostat the same way ", hacking the planet through geoengineering...