Under any rational democratic system, an issue of this importance would be subject to a series of citizen deliberations to establish the facts, followed by a national referendum for a Yes/No from the people.

https://www.independent.co.uk/news/uk/home-news/block-sunlight-british-scientists-global-warming-b2740295.html

UK scientists are about to attempt to dim the Sun

The project will see scientists attempt to reduce sunlight and as a result the temperature of the earth

The Independent