Adisadvantage of using hydroelectricity is select one it is nonrenewable it is a nonrenewable resource it can disturb natural ecosystems it causes air pollution

The greenhouse effect is primarily caused by cars and trucks.

Explanation:

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg