Billions of tons of material in the universe. Scientists consider a giant solar shield against warming

A planetary sunshade could reflect sunlight back into space to mitigate global warming, according to a new analysis. This concept, while reminiscent of science fiction, is gaining serious attention from scientists. The Planetary Sunshade Institute suggests that with advancements in rocket technology, such a project could become feasible within a few decades. The proposed system would involve millions of reflective membranes positioned at a specific point in space, reducing solar energy reaching Earth. However, significant technical, financial, and political challenges remain, including an estimated cost of six trillion dollars for construction and deployment. Additionally, the potential risks of system failure and the need for international governance raise further concerns about the project's implementation.