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.
Anda dapat melepaskan partikel tertentu, katakanlah asam sulfat -- sulfat -- ke atmosfer bagian atas, stratosfer, di mana partikel itu memantulkan cahaya matahari dan mendinginkan Bumi.