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In some places, communities are trying to geoengineer artificial glaciers that divert runoff from higher glaciers towards shaded, protected locations where it can freeze over winter to provide meltwater for irrigation in the spring.

Geoengineer a more reflective Earth.

Keutsch, who got involved later, is not a climate scientist and is at best a reluctant geoengineer.

For several decades, scientists have suggested ways to “geoengineer” the climate.

Carbon Engineering, the company set up in 2009 by leading geoengineer Keith, with money from Gates and Murray, has constructed a prototype plant, installed large fans, and has been extracting around one tonne of pure CO2 every day for a year.