нужноwhat are the causes of air pollution?​

Air pollution happens when solid and liquid particles—called aerosols—and certain gases end up in our air. These particles and gases can be bad for the planet and for our health, so keeping track of them is important.

The causes of air pollution are factories,plants traffic fumes

1. In Canada, January is colder than March.

2. I can afford to buy a new bike but not a new car. A car is more expensive than a bike.

3. You look thinner than the last time i saw you. Have you lost weight?

4. Mountains are higher than hills.

5. He got a very good mark on his exam. The exam was easier than he had expected.

6. I don't understand this lesson. It is more difficult than the last one we did.

7. I can't study in this room. It's too noisy. I'm going to find a more quiet(или quieter) place.

8. Our apartment is far from everything. We want to move to more convenient location.

9. Orange juice is healthier than Coke.

10. The store is having a great sale today. Most televisions are 25% cheaper than they were yesterday.

11. The doctor told me that I can go back to work if i feel better tomorrow.

1. In Canada, January is COLDER than March.

2. I can afford to buy a new bike but not a new car. A car is MORE EXPENSIVE  than a bike.

3. You look THINNER than the last time I saw you. Have you lost weight?

4. Mountains are TALLER than hills.

5. He got a very good mark on his exam. The exam was EASIER than he had expected.

6. I don’t understand this lesson. It is MORE DIFFICULT than the last one we did.

7. I can’t study in this room. It’s too noisy. I’m going to find a MORE CONVENIENT place.

8. Our apartment is far from everything. We want to move to a CLOSER location.

9. Orange juice is HEALTHIER than Coke.

10. The store is having a great sale today. Most televisions are 25% CHEAPER than they were yesterday.

11. The doctor told me that I can go back to work if I feel BETTER tomorrow.