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. These pollutants can harm the environment (e.g., acid rain formation from nitrogen oxides), damage ecosystems (e.g., affecting plant and animal health), and pose risks to human health (e.g., respiratory problems from particulate matter). So, their use in public lands leads to increased air pollution.

Answer:

They cause increased air pollution in these lands.