Read the passage carefully and choose the correct answer.

 Types of pollution

In total, there are eight sources of pollution in the modern world, which put negative effects on the natural world and the health of human beings.

Air Pollution

Air pollution comes from many sources such as vehicle exhaust, and construction. Several effects are smog increases, higher rain acidity, and higher rates of asthma.

Water Pollution

Water pollution can be caused by improper waste disposal and littering. Some effects of water pollution are decreasing the quantity of drinkable water, and affecting aquatic life.

Soil Pollution

Soil pollution sources include poisonous waste, sewage spills, household dumping and littering. Soil contamination can lead to loss of wildlife habitat.

Noise Pollution

Noise pollution can come from traffic, airports, railroads, construction, and concerts. Hearing loss is one example of noise pollution effects.

Radioactive Pollution

Sources of radioactive contamination include nuclear power plant accidents, and improper nuclear waste disposal. Radiation pollution can cause birth defects, cancer, and other health problems.

Thermal Pollution

Thermal pollution may be caused by power plants, air pollution, and deforestation. As temperatures increase, wildlife populations may be unable to recover from quick changes.

Light Pollution

Sources include large cities, billboards and advertising. If it is near residential areas, light pollution can decrease the quality of life for residents.

Visual Pollution

Visual pollution can be caused by other pollution or just by undesirable, unattractive views. It may lower the quality of life, or affect property values and personal enjoyment.

How many kinds of pollution are there in the world now?