The technology to tackle greenhouse gas emissions now exists. Are we brave enough to use it?
A leading thinker of the green movement argues that negative emission technology has the potential to be revolutionary - if we only it's deployed sensibly
Geoengineering has been advocated as a solution to climate chaos. Mirrors in space to reflect sunlight, human induced algal blooms to absorb carbon, and cloud seeding have all been proposed as ways to manage an impending climate crisis.
Many of these options, however, attempt to deal with the effects of climate change, not its causes. Their benefits are fleeting, they depend on continuous programmes of intervention and they have unacceptable side-effects at local and regional levels. They are unlikely to gain political support and will not succeed.