Question

what pollutant is causing algae blooms and red tide?sewage and fertilizers running off into the water, causing algae to over growacid rainburning fossil fuelsincreased oxygenrewatchsubmit

Explanation:

Algae blooms and red tides are driven by excess nutrients (nitrogen and phosphorus) entering water bodies. Sewage and fertilizers are rich in these nutrients; runoff introduces them to water, triggering uncontrolled algal growth. Acid rain impacts water pH but does not directly cause algal overgrowth. Burning fossil fuels contributes to climate change and acid rain, not direct algal blooms. Increased oxygen does not promote algal blooms (in fact, blooms deplete oxygen later).

Answer:

sewage and fertilizers running off into the water, causing algae to over grow