Skip to content
Login Register

#pollution sources

2 public questions tagged with this topic.

Applied Ecology

Which of the following is a non-point source of water pollution?

Fertiliser runoff is a non-point source because nutrients leave many dispersed fields through rainfall, overland flow, erosion, and subsurface drainage rather than through one readily identified discharge pipe. Its loading varies with land use, weather, soil, and farm management. A sewage outlet or industrial effluent pipe is a point source whose location can be mapped and monitored directly. Community-level consequences can emerge when physiological injury changes survival, reproduction, species interactions, or the flow of energy through food webs. Aquatic effects depend on chemical form, pe

Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology

View Details
Applied Ecology

Which of the following is NOT a source of natural air pollution?

Automobile pollution is anthropogenic because vehicle operation is a human activity that emits carbon monoxide, nitrogen oxides, hydrocarbons, particulate matter, and carbon dioxide. Volcanoes naturally release ash and gases; lightning, wildfires of natural origin, sea spray, and biological particles also affect air composition. Pollen is a natural aerosol produced by plants, although it can provoke allergy and worsen respiratory symptoms. Atmospheric inversions can trap contaminants near the surface, while wind, turbulence, precipitation, and chemical transformation determine their eventual d

Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology

View Details