What environmental disaster can be attributed to over-population and over-use of resources by humans?
a. the exxon valdez oil spill in alaska
b. climate change due to the greenhouse effect
c. the explosion of the chernobyl nuclear power plant in russia
d. severe contamination of the danube river in germany, by industrial chemicals

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation:

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.