One Scientist Hopes to Engineer the Climate With Antacid
To help cure the planet\u2019s ailments, Zhen Dai suggests antacid. In powdered form, calcium carbonate\u2014often used to relieve upset stomachs\u2014can reflect light; by peppering the sky with the shiny white particles, the Harvard researcher thinks it might be possible to block just enough sunlight to achieve some temperature control here on Earth.