1) in our days the environment is far from perfect.
2)man-made chemicals are destroying wildlife.
3)if the plants are not poured waste into rivers, fish and animals would not die.
4)if the ozone layer will not protect the Earth, the sun's rays are very dangerous for humanity.
5)radioactive pollution may be the cause of blood cancer.
6)if people cut down forests at the same rate, the climate of our planet will change very much.
7)this gas works like glass in a greenhouse.
8)if people hadn't wasted so much water, electricity and gas, we wouldn't have so many problems.
Всё!