Geoengineering comes in many forms, but one of the most prominent methods that scientists are pondering is to literally obscure the amount of sunlight that hits the planet. And the ideas are only going to get weirder from here.
In space, gravitational forces between two objects are often in opposition to each other, which means smaller objects caught in the middle are pushed around in certain directions. But there are a few points where that gravity comes to a balance—and objects at these points are basically in a stable place. When it comes to the sun and Earth, these points are known as Lagrange points. There are five of them, and the one known as L1 sits between the sun and Earth.
The total weight of the shield structure, in Szapudi’s view, should come out to about 3.5 million tons—only 1 percent of which would be the shield itself placed closer to Earth, and the rest being an asteroid or set of asteroids that is placed closer to the sun. Does this sound insane? Well, it should! This is a cartoonish solution to a problem that already has a clear answer . To be fair, Szapudi is pretty clear-eyed about the logistical and financial constraints that prevent us from rolling out such a solution to climate change.
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