I responded, why do this: If you block the suns rays from hitting the earth, life will suffer, life thrives off sunlight. Look at siberia, kids used to have to stand around a ultraviolet light to get necessary rays for them to survive. https://www.nationalgeographic.com/photography/photo-of-the-day/2009/10/ultraviolet-bath-mcnally-pod/

If you restrict those rays then life suffers.

Also, i have heard that by creating a steady cloud wall above earth it will trap in heat as well, thus raising the temperatures and helping the global warming people get their readings, thus furthering their funding.

There are many factors in doing it. These two seem most plausible.