water polluion

Question 1

eutrophication

Answer 1

fertilizer enters the water by leaching (mineral washed through soil)excessive growth of plants and algae
competition between plants and algae for sunlight
plants and algae die
bacteria break down the plant and algae material using oxygen in respiration
low oxygen conditions ,mean fish and invertebrates die

Question 2

fertilizers

Answer 2

• The nutrints, phosphates and nitrates in fertilizers cause eutrophication