How has air pollution contributed to the decline in caribou populations?

According to scientists the causes of the global caribou decline are straightforward rapidly rising arctic temperatures are throwing caribou out of sync with the environment in which they evolved oil and gas development, mining, logging, and hydropower projects in the far north are impinging on the caribou’s range and though not a major factor hunting is further depleting already beleaguered caribou populations.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.