11. Read and complete the sentences. These expressions and sentences can help you:to walk or use a bicycle instead of going by car, to save energy, to use less electricity, to turn off the lights when you leave a flator a house, to recycle used materials such as paper, bottles, and metal, to plant more trees, bushes and flowers, to developinternational cooperation in order to solve ecological problemstogether, to reduce car fumes, not to throw away litter in thestreets, parks, gardens, to keep our streets, parks, gardens, lakesand rivers clean from rubbish, not to pollute lakes and rivers withgarbage or poisonous substances, thousands of plant and animalspecies disappear because of air and water pollution, hunting, global warming, deforestation, destroying habitats, to save as muchwater as possible, to stop polluting air, water, soil, to take litterto the nearest waste bin, not to throw litter in classes, corridors, in squares, parks, streets, not to cut down trees, to be cleaner, to reduce global warming, not to kill animals and birds, to losetheir habitats.1. If people don't cut down trees, ...2. If we plant more trees, bushes and flowers, the air we breathe...3. If people didn't throw litter, the streets...4. Animals and birds wouldn't have lost their habitats if...5. If we used public transport, ...6. If I were a President, I...7. If people want to survive, they...8. If we don't take care of our environment, ...9. If we don't create and preserve national reserves, ...10. If we had developed international cooperation, ...11. If we don't stop explosions on ammunition dumps, ...12. If we want to live a happy life, we have to...​