1 .The greenhouse changes around the world.
2. Pollution from cars and factories has created a thick smog above the city.
3.Recycling and composting are environmentally-friendly methods of disposing waste.
4. Sea levels are rising due to global warming.
5. 200 miles of coastline was polluted by the oil spill, killing thousands of birds and other marine wildlife.
6. This year, we'll be planting 1,000 trees as part of our conservation project.
7. Fossil fuels, such as petroleum, are non-renewable resources because they take a long time to replace.
8 . Scientists believe the hole in the earth's ozone layer is shrinking.
1 he was looking forward to his holidays.
2 they had had a day away at the beach.
3 his mum had taken themto an alligator farm.
4 there was a big pool with lots of alligators.
5 she didn't like alligator meat.
6 they had never seen such a beautiful view.
7 her dad worked in town.
8 they spent their holidays on a farm every year.
9 they had gone for a picnic.
10 his brother had come home late.
11 he was looking for his key.
12 they had bought a farmhouse in the country.
13 he had been to the top of the Empire State Building.
14 she had forgotten to give him her address.
15 he liked science fiction books.
