Which of the following would be considered a "point source" of water pollution?
a. Oil collected from city streets and parking lots
b. Pesticide runoff from farms
c. Groundwater contamination at a fracking site
d. Fertilizer runoff from suburban neighborhood yards

c. Groundwater contamination at a fracking site

Explanation:

all others could be sources from tens of square kilometers of surface area.

Fracking is limited to within a short range of the well hole.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

multiply 2kg by latent heat of vap