Consider black carbon, a component of the soot emissions from diesel engines and the inefficient burning of biomass cooking stoves that is linked to 1.6 million to 1.8 million premature deaths annually as a result of indoor exposure and 800,000 as a result of outdoor exposure. Black carbon, which absorbs heat from the sun, also accounts for anywhere from 10% to more than 45% of the contribution to global warming, and is also linked to accelerated losses of glaciers in Asia, because the soot deposits darken, ice making it more vulnerable to melting.