1.The water is polluted. The fish are dead (because of) 2.Global warning happens. There is too much carbon dioxide in the atmosphere (cause) 3.Ships spill oil in occans and rivers. Many aquatic animals and plants die (lead to) 4.Students are more aware of protccting the environments. Teachers teach environmental issues at school. If... 5.She has a headache after work everyday. She works in a noisy office If... 6.Vy had a stomachache. She atc a big dinner. (since) 7.People throw rubbish in the streets. The streets doesn't look attractive. If... 8.If you (be)......the president, what......you (do).....to help the environment? 9.The air (be) ......fresh if we (plant)..... a lot a of trees. 10.We (save) ......lots of trees if we (not waste)...... paper