Having been here on earth for a while, you know that every year is made up of four seasons. what causes the changes in seasons?

a) the rotation of the sun.
b) the tilt of the earth on its axis.
c) the heating and cooling of the sun.
eliminate
d) the rotation of the earth on its axis.

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”

Answer (d) the greenhouse effect is primarily caused by car and trucks;