Question

1.Draw a diagram/picture describing how a contaminant in river sediment can migrate downstream. NOTE Be sure to

include enough words/labels that I can follow your reasoning

2.How might over application of pesticides (for example, during a West Nile outbreak) in an area interrupt the natural ecology?

Answer 1

ANS 1) -------------------------------------------------------------------------------------------------------------------------------------------------------

ANS 2) Spraying insecticides from the air over populated regions to kill person mosquitoes interrupt the natural ecology.West Nile virus recedes right into a nation referred to as persistent endemicity, one in which only a few people are infected. furthermore, indiscriminate spraying can growth resistance in non-target insects in order that there is probably no powerful manage available while an real chance seems, and it harms useful insects, whose recuperation cycle is regularly lots longer.