Warmist Mark Lynas: "the globe is already cooled by human-injected aerosols, perhaps by half a degree or more"

Mark Lynas: Home » climate change » Geoengineering: why all the fuss?

The addition of mirrors at the Lagrange point between the sun and the Earth would be prohibitively expensive – more so by far than simply getting rid of fossil fuel-combusting technologies and replacing them with zero-carbon ones.
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But there is a real issue here: the globe is already cooled by human-injected aerosols, perhaps by half a degree or more.  These come from biomass burning, coal-fired power stations and suchlike...