Pollution Basics
What is pollution?
Pollution is the introduction of harmful substances or forms of energy into the environment, causing negative changes to natural systems.
Which type of pollution affects the atmosphere?
Air pollution
Name one fossil fuel whose burning causes air pollution.
Coal
Name one source of water pollution.
Untreated domestic sewage
What is pollution control?
Measures taken to prevent, reduce, or eliminate the release of pollutants.
Name two forms pollutants can take.
Chemical substances, solid waste, or harmful gases.
Pollution caused by toxic substances entering water bodies is called what?
Water pollution
Which gases contribute to acid rain?
Sulphur dioxide (SO₂) and nitrogen oxides (NOₓ).
What is eutrophication
Excess nutients causing algal blooms and oxygen depletion in water bodies.
Which device removes sulphue dioxide from industrial emissions?
Scrubbers
List two major human activities that cause pollution.
Rapid industrialization and improper waste management.
Which type of pollution affects plant growth and food safety?
Soil pollution
Why is particulate matter especially dangerous?
It can penetrate deep into the respiratory system and cause serious health problems.
How do heavy metals affect the food chain?
They accumulate in organisms and move up the food chain, posing health risks to humans.
What s the role of sewage treatment plants?
To treat wastewater and remove organic waste and pathogens
Why is pollution a threat to ecological balance?
It degrades natural resources, harms ecosystems, and disrupts natural processes.
Name the three major types of pollution discussed.
Air pollution, water pollution, & soil pollution
Mention two health effects of air pollution.
Respiratory diseases and aggravation of existing health conditions.
Mention two causes of soil pollution.
Overuse of fertilizers and disposal of hazardous industrial waste.
What is bioremediation?
A method that uses microorganisms and planst to remove or nuetralize soild contaminants.
Why is studying pollution important?
It helps develop preventive measures, control technologies, and sustainable practices to protect health and the environment.
Match one type of pollution with one source.
Air pollution – vehicle emissions / Water pollution – industrial effluents / Soil pollution – chemical waste.
How does air pollution affect both humans and the environment?
It causes health issues in humans and damages forests, crops, and contributes to global warming.
How does soil pollution threaten food security?
It reduces soil fertility and allows toxins to enter crops and the food chains.
What is bioremediation considered environmentally friendly?
It is natural, cost-effective, & does not harm ecosystems.