Which of the following will allow for the greatest reduction in an individual’s carbon footprint?
a.
replacing incandescent bulbs with compact fluorescent bulbs
b.
bicycling instead of driving
c.
eating vegetarian
d.
none of the above
answer only if you know! : )

I dont know 

JK ;)  

its A.

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.