This could also be posted to How to Save the World for Free, but it’s relevant to the phone comic I’m working on.
Unmanned ships that sprayed sea water into the atmosphere to boost low lying clouds could produce sufficient cooling effects to counteract global warming due to CO2 rises. They’d cost £1m to £2m and at least 1500 would be needed. If they did work that’s £3billion to mitigate the damage already done and buy us time to find alternative technologies. That’s just over a fortnight of the abomination that is the Iraq occupation, to make such crimes less likely in the future.
So don’t be surprised when Bush and Brown don’t invest in it.