2. Work in pairs. Think of more containers and contents. a tin of tuna The consumer quiz How much chocolate do you eat in your life? How many kilometres do you travel by car? A team in the UK looked for the answers to these questions and others. Guess the answers. There's one answer that you do not need.

People do usually say that nature is our mother. It gives a person everything that is necessary for life, even though we don't always appreciate its gifts. What could be better than the warm sun, majestic mountains, and blooming trees in the spring? The world of nature is very rich and varied. There are hundreds of thousands of species, many of which we've never seen in our life.

We all used to live in a world that seems to be built by ourselves. We live in big houses equipped with high-tech consumer devices; we are able to travel long distances using cars, trains, and planes. We are able to know what is happening thousands of miles away, over the Internet or television. But all of this is secondary. We use the knowledge of the laws of nature and its power to create all these technologies anyway.

Cars burn petrol, factories burn coal and emit toxic fumes. The pollution is gathered in clouds that the winds carry far away. When it rains pollution lands on everything that surrounds us. This is called acid rain. Acid rain also gets into lakes, rivers, seas, and soil and pollutes everything causing serious damage. Fortunately, the governments have been trying to reduce the air pollution using new technologies. But we have to do more! but we need to do more. We can help reduce the amount of acid rain by using ours cars less or by using solar power to heat our homes.