Question

when visitors come to public lands, they typically arrive by fossil fuel-powered vehicles. why is this a problem? they cause increased air pollution in these lands. they decrease the air pollution in these lands.

Explanation:

Fossil fuel-powered vehicles emit pollutants like carbon monoxide, nitrogen oxides, and particulate matter when operating. These emissions directly add contaminants to the air, leading to higher air pollution levels in the areas they enter, such as public lands. The second option contradicts the known environmental impact of fossil fuel combustion.

Answer:

They cause increased air pollution in these lands.