Pollution and Human Impact

'Point source pollution' means the pollution of water reserves by a single and definite source of pollution. Oil spillage from a ship in the ocean is an example of point source of pollution 

It is a microbiological contamination. We can understand that water can be polluted by the following ways: (1) Microbiological (2) Industrial (3) Agricultural (4) Petrochemical (5) Sewage disposal (6) Radiological (7) Thermal pollution

Eutrophication is caused due to nutrient enrichment of water resulting in algal blooms.

This is the correct option as fertilisers, pesticides, petroleum oil and solid particles all are the causes of water pollution.

Soil and water get polluted when DDT is sprayed on crops.  When DDT is sprayed on the crops soil absorbs it and thus soil also gets polluted.

A crippling deforming caused by methyl mercury poisoning that was first described in the in habitants of Mina Mata bay, Japan and resulted from their eating first contaminated with mercury industrial waste. Itai Itai Water contaminated with cadmium can cause itai itai disease, lung & liver cancer itai itai also known as over disease (a painful decrease of bones & joints) caused by water contamination by cad mium.

Phytoplanktons are photosynthesising microscopic organisms that inhabit the upper sun-lit layer of almost all oceans and freshwater bodies. Thus, growth of phytoplanktons in water bodies is not responsible for water pollution. 

Non-point source pollution refers to diffuse contamination that does not easily attributed to a single source. Non-point source water pollution affects a water body from sources such as polluted runoff from agricultural areas draining into a river, or wind-borne debris blowing out to sea, whereas discharges from a sewage treatment plant, a factory, or a city storm drain are examples of point pollution sources of river water.

Industrial waste is the main factors of water pollution.

Correct answer is (5). 

In this pollution, pollutants accumulate in the environment and may appear in the food chain, e.g. insecticides.

Irrepairable computers are an example of e-waste.

Overpopulation is the root of all other environmental issues.

This is the correct answer. Derby, Leeds and Manchester had laws to control smoke in the city by 1840s.

Plastic is the most significant soil pollutant due to its non-biodegradable nature, massive global production, and persistence in soil for centuries. It physically alters soil structure, releases toxic chemicals, and fragments into microplastics that enter the food chain.