Ex. 1 Match the words with their definitions
1. environment
2. to reduce
3. ecology
4. to reuse
5. extinct
a) the way in which plants, animals and people are related to each other
and to the environment
b) no longer exists
c) the air, the water, and land in which people, animals and plans live
d) to use something again
e) to make something smaller or less in size, amount or price