POLLUTION GRADE 4 R

When harmful substances build up in the air to unhealthy levels it is known as...

• unfortunate

• air pollution

• chemicalization

• water pollution

Increase in Greenhouses gases lead to _____

• Melting of polar ice- caps

• Destroy the ozone layer

• Cause respiratory problems

• Create smog

Which of the following gases cause greenhouse effect?

• Nitrogen

• Oxygen

• Helium

• Carbon dioxide

Which of the following type of pollution is harmful to living beings?

• water pollution

• air pollution

• land pollution

• all of these

It is the mixture of gases that surround the earth.

• atmosphere

• exhaust

• lead

• the poles

Which of these problems can be caused by air pollution?

• Respiratory problems
• Reduced food sources for humans
• Increased disease for humans
• Decrease in global temperatures

Increase in which gas is primarily responsible for increased global warming?

• Carbon dioxide
• Water vapor
• Methane
• Nitric oxides

Which of these is an example of a natural cause of air pollution ?

• Volcanic eruptions

• Driving cars

• Burning coal

• Using electricity

How can individuals help reduce air pollution at home ?

• By leaving the lights on all the time

• By using energy-efficient appliances and recycling

• By using more fossil fuels

• By planting fewer trees

Which renewable energy source helps reduce air pollution ?

• coal

• wind energy

• Natural gas

• Diesel