ex 22 :
1 - to build ....
2 - thick cloud ....
3 - programme difficulties ....
4 - industrial waste .....
5 - to dump .....
6 - breathing life .....
7 - breeding plant .....
8 - endangered species .....
9 - time capsule .....
10 - life expentancy
ex 7 :
1 - Smog and factory smoke cause damage to the ozone layer. As result the eart is not protected from ultraviolet radiation.
2 - Industrial waste cause water pollution . As result fish die.
3 - Sewage cause water pollution. As result diseases are spread.
4 - Use of aerosols cause air pollution. As result greenhouse gases are produced.
