Exercise 5: 1. Many chemicals have a damaging effects on the environment. - Opposite: D. harmless 2. A good way to deal with a big problem is to break it down into a series of smaller ones. - Opposite: A. remove 3. We are running out of natural resources, so it's time to save them. - Opposite: A. using up 4. An imbalanced ecosystem may cause a lack of food, water and fresh air. - Opposite: C. clean 5. We may talk about a lot of benefits provided by a healthy ecosystem. One of them is that it provides - Opposite: C. disadvantages Exercise 6: 1. solar - I. power 2. GM (genetically modified) - H. foods 3. carbon - F. emissions 4. global - D.layer 5. endangered - G.forest 6. greenhouse - C.effect 7.acid- B.rain 8.waste- E.disposal 9.ozone- J.warming 10.rain- A.species Exercise 7: 1.Many forests have been damaged by acid rain. 2.The greenhouse effect is causing the earth's atmosphere to heat up. 3.Global warming will cause the icebergs to melt. 4.The Amazon forest is in the Amazon Basin of South America. 5.The ozone layer helps to protect the earth from harmful radiation from the sun. 6.Coal-burning power stations are a source of carbon emissions. 7.Some endangered species can only be seen in zoos. 8.Solar power is a renewable source of energy. Exercise 8: 1.A football pitch 2.Many tennis players prefer tennis courts with a grass surface. 3.The game will be played under floodlights. 4.The two teams will play a big match at the world-famous Wembley tower block . 5.She takes her inspiration from shells and stones she finds on the seashore . 6.A safety net is the one that is put below people performing at a great height to catch them if they fall. 7.The outdoor swimming pool is open during the summer months. 8.They tried to climb up the great mountain range of the Alps. Let me know if you need further assistance!