Guardian: Hacking the planet's climate by launching mirrors into space, triggering algal blooms in the oceans and seeding clouds are among experimental "Plan B" schemes world leaders would have to consider if the rise in carbon emissions cannot be curbed within a couple of decades, according to one of Britain's most senior scientists.
Geoengineering, though controversial and "an utter political nightmare", would buy time to develop cleaner sources of energy, the astronomer royal Lord Rees will say in a...