A ‣ The problem 
WHAT IS THE GREENHOUSE EFFECT?Many greenhouse gases, e.g. carbon dioxide, methane and ozone, exist1 naturally and are needed to create2 the greenhouse effect that keeps the Earth warm enough to support3 human life. However, the use of fossil fuels, e.g. oil, natural gas and coal, has produced excessive4 amounts of greenhouse gases, and the result5 is global warming: an increase in the average temperature on Earth. Of the 15 warmest years on record6, 14 have occurred7 since 2000.
The effects8 of climate change can already be seen in our everyday lives. Summers are getting hotter and winters are getting wetter, so drought9 and floods10 are becoming more common. With it, animal and plant life is suffering11 – some species will disappear altogether – and certain illnesses, e.g. hay fever, asthma and skin cancer, are becoming more common.
To stop global warming from destroying12 our environment13, we need to act now.
1 are real or present
2 make something happen or exist
3 help (human life) to continue
4 more than you want or need
5 something that happens because of something else that has happened
6 If information is on record, it has been written down or kept on a computer.
7 happened; fml
8 a change or result that is caused by something
9 a long time without rain when people do not have enough water
10 when water covers an area that is usually dry, often from too much rain
11 experiencing something which is unpleasant
12 damaging something so badly that it does not exist or cannot be used
13 the air, land and water around us
B ‣ The solution* – or part of it 
To reduce global warming [make it less], the nations of the world will have to act together [do something to solve a problem; syn take action]. In the meantime, individuals can also help.
SIX WAYS TO REDUCE GLOBAL WARMING:
- Don’t throw things away – recycle paper, glass, plastic, etc. so that it can be used again.
- Save1 energy2 e.g. switch off lights when you leave a room.
- Don’t waste3 water, e.g. turn off the tap when you are brushing your teeth.
- Change light bulbs for more energy-efficient4 ones.
- Drive less and walk more.
- Plant trees5 because trees reduce the amount of carbon dioxide in the atmosphere, and so reduce greenhouse gases.
* the answer to a problem
1 don’t waste
2gas and electricity
3 use it badly
4 working well and not wasting energy
5 put a new tree in the ground