Suspected militants have killed 11 civilians, including five migrant workers, in Kashmir since early October, this despite a widespread security crackdown in the heavily militarized region.
At sea level, air molecules are so thick that one molecule can move only the tiniest distance, about three-millionths of an inch, to be precise-before banging into another.
Solomon says that hydrochloric acid latches onto the surface of the smoke particles and reacts with other molecules to produce molecular chlorine, which is broken down in sunlight to highly reactive 'ozone-eating' chlorine ions.
Because it is highly reactive, it scarcely exists on Earth in its free state and is instead bound up in molecules with other elements, chiefly carbon, in natural gas and other hydrocarbons, and oxygen in water.
Drag is not a perfect answer to maneuvering in space above an altitude of about 650 kilometers air molecules are too rare for the technique to be feasible, so it works only in the lowest of lower orbits.