And when it is, it gives off emissions like carbon dioxide, sulfur dioxide, mercury, ash and particulates, all of which can pollute the environment.

当燃烧煤炭时就会产生二氧化碳，二氧化硫、汞、灰尘和微粒，所有这些都会污染环境。

Geoengineering would use a technique called stratospheric aerosol injection, or SAI.This would employ aircraft to disperse sulfuric acid or its precursor sulfur dioxide into the upper atmosphere to form.

地球工程将使用一种称为平流层气溶胶注入或 SAI 的技术。这将使用飞机将硫酸或其前体二氧化硫分散到高层大气中形成。