Environmental Studies · General Awareness

Pollution and Human Impact

2,911 Questions

Pollution involves the introduction of contaminants into natural environments, causing severe human impact. This hub focuses on water pollution, thermal pollution, soil contamination, and diseases like Minamata. It is a highly relevant topic for environmental studies in UPSC exams.

Water pollution sourcesOcean pollutantsHeavy metal contaminationSoil erosion impactsThermal pollution causes

Pollution and Human Impact Questions

Multiple choice

The ground water pollution is due to excess of�

  1. DDT

  2. Pesticides

  3. Minerals

  4. Carbon deposit
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Excess minerals in groundwater can cause contamination through natural leaching or anthropogenic activities. High concentrations of minerals like arsenic, fluoride, or nitrates make water unsuitable for consumption and cause health issues.

Multiple choice

The river Periyar gets pollution mainly from�

  1. Tanneries

  2. Paper factories

  3. Chemical factories

  4. Sugar mills
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Periyar river in Kerala is heavily polluted by chemical factories, particularly in the Eloor industrial area. These factories discharge toxic effluents containing heavy metals and organic chemicals, severely degrading water quality.

Multiple choice

The sea water gets pollution mainly due to�

  1. Industrial waste

  2. Oil spills

  3. Death of marine fauna

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oil spills are major sources of marine pollution, creating slicks that harm marine life, damage ecosystems, and persist for years. Oil coats marine animals, prevents oxygen exchange, and introduces toxic hydrocarbons into the food chain.

Multiple choice

The major cause of pollution is�

  1. Man

  2. Plants

  3. Animal

  4. Man and animal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Human activities (industrialization, urbanization, deforestation, vehicle emissions, etc.) are the primary drivers of environmental pollution. While animals can contribute to localized pollution, human activities are overwhelmingly the major cause on a global scale.

Multiple choice

The most severe environmental hazard to mankind is due to

  1. air pollution

  2. water pollution

  3. noise pollution

  4. radioactive pollution
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Radioactive pollution is considered the most severe because radioactive materials can remain hazardous for thousands of years, cause genetic mutations that affect future generations, and spread through air, water, and food chains. Unlike other forms of pollution which may be reversible, radioactive contamination can persist for geological timescales.

Multiple choice

The causes of water pollution are�

  1. 2, 4 D and pesticides

  2. Smoke

  3. Automobile exhaust

  4. Aeroplanes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

2,4-D and pesticides are agricultural chemicals that runoff into water bodies, causing pollution. These toxic compounds contaminate groundwater and surface water, harming aquatic ecosystems. The other options are related to air pollution, not water pollution.

Multiple choice

Photochemical smog is related to the pollution of�

  1. Soil

  2. Water

  3. Noise

  4. Air
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Photochemical smog is a type of air pollution formed when sunlight reacts with nitrogen oxides and volatile organic compounds from vehicle exhaust and industrial emissions. This creates secondary pollutants like ozone and peroxyacyl nitrates. It specifically affects atmospheric air quality.

Multiple choice

There is some concern regarding the nanoparticles of some chemical elements that are used by the industry in the manufacturing of various products. Why?

  1. They can accumulate in the environment, and contaminate water and soil.
  2. They can enter the food chains.
  3. They can trigger the production of free radicals.

Which of the following is the correct option?

  1. 1 and 2 only

  2. 3 only

  3. 1 and 3 only

  4. 1, 2 and 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All statements are correct based on fundamentals of Nanotoxicolgy.

Multiple choice

Depletion of ozone causes

  1. global warming

  2. eutrophication

  3. skin cancer

  4. acid rain
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Depletion of ozone layer makes way for harmful UV radiations to enter Earth's atmosphere, leading to skin cancer.