Ответ:

ex2

endangered speices, air pollution, energy waste, acid rain, global warming

1. acid rain 2.air pollution 3.global warming 4.endangered speices 5. energy waste

ex3

1b, 2e, 3a, 4f, 5c, 6d

2.To save animals from extinction we should protect endangered speices-

3. To avoid deforestation we should plant trees.

4. To avoid energy waste we should turn off...

і так далі)

Объяснение: