It may sound drastic to physically manipulate entire biomes rather than, say, stop extracting fossil fuels, but in recent years, these kinds of ideas have grown more prevalent. Other so-called “climate solutions” have envisioned removing carbon from the atmosphere by planting 1 trillion trees (which would have uncertain climate benefits and require an unrealistic amount of space), cultivating carbon-munching bacteria, or “managing” global sea level rise by building giant underwater curtains. At least one scientist has put forward the idea that we “manipulate the orbit of asteroids,” hitching them to the Earth to nudge the planet to a cooler zone farther away from the sun, despite the risk that this would eject us from the sun’s orbit.