On November 4th, Musk made a speech on the

In fact, Musk is not the first person to propose the idea of ​​”shading and cooling”. In recent years, a number of start-ups have begun testing different forms of “solar radiation management” technologies, including injecting reflective aerosols into the stratosphere and launching reflective satellite arrays. Some of these companies have even received millions of dollars in venture capital and are regarded as the frontier of “next-generation climate technology.”

However, experts generally warn that these projects are still far from actual deployment, and are extremely complex with technical difficulties, ethical controversies, and ecological risks. At the same time, changing solar radiation may disrupt the global weather system, lead to changes in rainfall patterns, and even trigger abnormal regional cooling , including the previous American TV series/movie “Snowpiercer” which is an artistic depiction of this situation. At the same time, even if SpaceX has a strong space infrastructure, expanding the “solar radiation management” solution to a planetary scale is still far more difficult than imagined.

However, the timing is intriguing. As global high temperature records are set every year and emissions reduction progress continues to lag, even climate intervention plans that were considered “radical” in the past are now gradually coming into public view. Regardless of whether SpaceX will actually enter the field of “solar radiation management”, Musk’s participation makes this concept destined not to fade away from people’s discussion anytime soon.