1.
What harmful chemicals, once used in refrigerators, damage the ozone layer?
2.
What gas do we need to breathe, making up 21% of the air?
3.
What word describes something harmful or poisonous to living things?
4.
What is the term for the release of gases from vehicles and factories into the air?
5.
What element, when combined with oxygen, contributes to acid rain?
6.
What type of energy comes from the sun and can be harmful if not blocked by the ozone layer?
7.
What process produces pollution when we use fuels like coal, wood, or gasoline?
8.
What is the term for unwanted materials from homes or factories that can pollute the environment?
9.
What do we want our air to be, free of pollutants?
10.
What are air-like substances that can include pollutants like carbon dioxide and methane?
11.
What are tiny drops of liquid in the air, often from chemicals or heated substances?
12.
What effect refers to the trapping of heat by certain gases in the Earth’s atmosphere?
13.
What gas is produced by cows and landfills, and is a potent greenhouse gas?
14.
What word describes the dirty mix of smoke and fog that can make it hard to breathe in cities?
15.
What heavy metal can be found in polluted air and is harmful to our health?
16.
What is the dirty air released from vehicles that contributes to pollution?
17.
What layer protects us from the sun's harmful rays but can be harmful at ground level?
