English B1 Plus With a Little Help from our Friends

Complete the blanks in the text with the following words: cucumber animals biological plastic bacteria air Life on Earth is under threat due to human activity. There is unbelievable 1) waste in the oceans. Factories, power stations and vehicles pollute the 2) and raise the level of carbon dioxide in the atmosphere. However, living organisms like 3) that we consider responsible for infections and illnesses actually help clean up our planet They break down waste. Without them the ground would be covered with 4) waste. Scientists are even researching bacteria that can break down plastic waste Scavengers like hyenas and vultures feed on dead 5) . Without them forests and plains would be covered with dead bodies. Underwater, creatures like the sea 6) work like vacuum cleaners. They help clean the sea floor and corals by removing any organic waste.