Read the text below. Use the word given to form a word that fits in the space. 

THE ENVIRONMENT: OUR RESPONSIBIL Y 

These days it is impossible to open a newspaper without reading about the damage we are doing to the environment. The earth is being (I.threat) .threatened.. and the future looks bad. What can each ofus do? We cannot clean up our (2. pollution) polluted rivers and seas overnight. Nor can we .stop the (3. appear) .disappearance.. of plants and animals. But we can stop adding to the problem while (4. science) ..scientists. search for answers, and laws are passed in nature's defense. It may not easy to change your lifestyle (5. complete) completely , but some steps are easy to take: cut down the amount of (6.drive) .driving.. you do, or use as little. plastic" as possible. It is also easy to save energy, which also reduces household bills. We must all make a personal (7. decide) .decision.. to work for the future of our planet if we want to ensure a better world for our grandchildren.