You could put signed particles, say sulfuric acid particles -- sulfates -- into the upper atmosphere, the stratosphere, where they'd reflect away sunlight and cool the planet.
你们可以把带电粒子，比如说硫酸粒子——硫酸盐—— 放入较高的大气层，也就是平流层， 在平流层这些粒子可以反射阳光，帮地球降温。