1. the presence in or introduction into the air of a substance which has harmful or poisonous effects.
2. Air pollution is caused by poisonous gases, sulphur dioxide, nitrogen dioxide, carbon monoxide and very small particulates. It is also caused by the smoke and harmful gases released by the fires that make vehicles and factories go.
3. Air pollution may cause breathing problems such as asthma or other health problems. It also causes diseases like cancer.
Answer: 1. Air pollution is caused by poisonous gases, sulphur dioxide, nitrogen dioxide, carbon monoxide and very small particulates. It is also caused by the smoke and harmful gases released by the fires that make vehicles and factories go.
2. Air pollution causes global warming and acid rain. It results in increased temperatures, erratic rains and drought worldwide.
3. Air pollution may cause breathing problems such as asthma or other health problems. It also causes diseases like cancer.
(I don't quite understand 4th and 5th)
(My answers are based on the link you've encircled.)
Answers & Comments
1. the presence in or introduction into the air of a substance which has harmful or poisonous effects.
2. Air pollution is caused by poisonous gases, sulphur dioxide, nitrogen dioxide, carbon monoxide and very small particulates. It is also caused by the smoke and harmful gases released by the fires that make vehicles and factories go.
3. Air pollution may cause breathing problems such as asthma or other health problems. It also causes diseases like cancer.
i don't know the answer of both 4 and 5 so there
Answer:
1. Air pollution is caused by poisonous gases, sulphur dioxide, nitrogen dioxide, carbon monoxide and very small particulates. It is also caused by the smoke and harmful gases released by the fires that make vehicles and factories go.
2. Air pollution causes global warming and acid rain. It results in increased temperatures, erratic rains and drought worldwide.
3. Air pollution may cause breathing problems such as asthma or other health problems. It also causes diseases like cancer.
(I don't quite understand 4th and 5th)
(My answers are based on the link you've encircled.)
Carry On Learning.