untreated sewage: Residual water or also called sewage is any type of water whose quality was negatively affected by anthropogenic influence.

acid rain:rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes

frozen: past participle of freeze.

endangered species:a species of animal or plant that is seriously at risk of extinction.

overfishing:deplete the stock of fish in (a body of water) by too much fishing.

global warming:a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.

greenhouse gas:a gas that contributes to the greenhouse effect by absorbing infrared radiation, e.g., carbon dioxide and chlorofluorocarbons.

atmosphere:the envelope of gases surrounding the earth or another planet.

climate change:Climate change refers to long-term changes in temperatures and weather patterns.

coastal flooding:Coastal flooding normally occurs when dry and low-lying land is submerged by seawater.

fossil fuels:a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.

solid waste:Urban solid waste, urban solid waste, urban waste or domestic waste, are those residues, garbage, waste or waste that are generated in urban centers or in their areas of influence