Question

After the aswan high dam was built on the nile river, the rate of parasitic worm infection doubled in the human population near the dam. as a result of building the dam, the flow of the nile changed. this changed the habitat, which resulted in an increase in its population of a certain aquatic snail. the snails, which were infected, released larvae of the worm. these larvae then infected humans. this situation best illustrates that: *

Answer 1

The answer is ‘The influence of humans on a natural system can have unpredictable negative impacts’ . Other such influences on the natural environment are the use of fossil fuels for energy. The released greenhouses gases have resulted to increase in global temperatures and climate change.