Pollution in the what will have the greatest effect on human health

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

Which short-term environmental change is most likely to lead to ground shifting, landslides, and the collapse of buildings or roads? forest fires flooding earthquakes