Define Pollution ? Q Explain one way pollution can affect water quality?

The presence of chemicals, dirt or other substances which have harmful or poisonous effects on aspects of the environment such as rivers and the air A. Wastewater from agriculture (1) can cause increased eutrophication of the water (1) because of the high concentration of chemicals (1). • Plastics dumped in rivers (1) can cause a decrease in water quality (1) damaging river ecosystems / affects the food chain (1). • Discharge of sewage (1) lowers water quality/making water dirty (1) threatening human health (1). • Chemicals have been added to the water (1) downstream impact on wildlife (1) which could disrupt food ch