Pollution of rivers, lakes and seas is a major concern for people who seek to protect the environment. What are the possible causes of water pollution, and what effects does this have on animal life and human society?
Some people think that it is wrong for humans to search for new worlds in space when we have so many problems on our own planet. Others believe such searches help mankind to develop. Which viewpoint do you agree with?
The global population is increasing rapidly. Some people say that most of the world’s problems are caused by overpopulation. To what extent do you agree or disagree with this statement?
In many countries, plastic shopping bags are the main type of rubbish. They cause water and land pollution, so they should be banned. To what extent do you agree or disagree?