Sec 1 WB 2.2 Answer

Qn 1(a)
A: Trees are cut down.
B: Factories that give out a lot of smoke are built.
C: Modern buildings are built.
D: Crops/ Vegetables are planted by people.

Qn 1(b)
By cutting down the trees, the natural habitats of animals are destroyed and the animals may become extinct. (A)
The air becomes polluted. (B)
By constructing buildings, people have changed the physical environment and turned it into a human environment. (C)
The original plants have been removed. (D)

Qn 1(c)
We should be concerned especially if these activities affect the environment negatively. For example, polluted air can make people ill and a loss of trees means a loss of natural habitats.

Qn 1(d) (for express)
A large pit has been dug and a truck is dumping waste into it.