1. I Fill in each blank with a word or phrase from the box to complete the passage.

other plants     unhealthy    sustainable

big difference                   to breathe

The environment is everything around us. It includes all living things. It also includes everything that is not alive, such as the soil, the air and the water.

Human activities can make the environment (1) ________ , and it needs to be cleaned up. Unfortunately, millions of people on our planet live in areas in which the air is not safe (2) ________ . Air pollution can also cause a kind of water pollution called acid rain. The rivers and lakes become so acidic that fish cannot survive, and neither can trees and (3) ________

There are many ways that we can cooperate to take care of our environment in our everyday life. By doing our part to work toward a (4) ________ planet, we’ll also be providing others with inspiration and a good example to follow. As individuals we have the potential to make a (5)________ and together we can change the world.