The United Nations have meetings where world leaders agree on what to do about global warming. If there is too much pollution in the air, some people have health problems.
Ecologists looked for special spots on white pine trees to know if there
are any high levels of ozone.
Many types of air pollution are invisible, but some can be seen with the naked eye.
The teacher asked the boys if they did the task.
Satellite images proved that deforestation increased rapidly.
The passage is so difficult that I cannot understand it.
Experts said that less than 3 per cent of the water on Earth is fresh water.
His health has improved since he returned from the hills.
If we had sorted the waste, we would have saved millions of kilowatts of energy.
1. I will be doing my homework at this time tomorrow.
2. We will be playing piano at six o'clock tomorrow.
3. She will be speaking French at French school at seven o'clock tomorrow.
4. Mike will be playing football from 5 till 7 tomorrow evening.
5. John will be reading a newspaper at this time on weekends.
6. Don't come to my place at 8 o’clock tomorrow. I will be writing a composition the whole evening.
7. I won't be watching TV the whole evening.
8. What will you be doing at this time tomorrow morning?
9. Sue will be listening to her favourite music at 9 o’clock on holiday.
10. Will you be playing volley-ball at this time tomorrow?
