Should we reflect sunlight to cool the planet?
The climate change crisis has become so dire that we’re being forced not only to think of ways to curb emissions and mitigate greenhouse gases, but of ways to adapt to our current situation to buy ourselves more time.
One of those technologies is called solar geoengineering. It happens in nature when huge volcanic eruptions cover the stratosphere with ash: That ash forms a layer that reflects sunlight and cools the planet underneath. Solar geoengineering takes advantage of that principle, using different scientific methods to make the planet more reflective overall. The problem is, deploying it would require messing with our very complicated climate on a massive scale, and many scientists don’t think the risks are worth it.
The open letter for an international non-solar geoengineering agreement signed by 400 scientists, including Professor Raymond Pierrehumbert, can be found here:
The open letter supporting further research into solar geoengineering signed by 110 scientists, including Professors David Keith and Sarah Doherty, can be found here:
Read the Sami Council’s letter calling to shut down Harvard’s SCoPEx project, which Professor David Keith is affiliated, with here: