II. Combine the column A with B: A B 1.What’s a carbon footprint ? a.Hydro power and solar power 2.Why is oil a non-renewable energy source? b.It’s dangerous and expensive 3.What are the disadvantages of nuclear power? c.Because it’s abundant and clean 4.Why should we save energy ? d.It’s the negative effects we have on the environment 5.What should we do to reduce our electric bills? e.Because it takes a long time to replace it 6.What should the government do f.Because it’s important in people’s life to reduce the use of petro? 7.What type of energy sources will be used g.We should use low energy light bulbs in Viet nam in the future? or turn off the lights before going to bed. 8.Why do you think biogas will be used h.The government should increase the tax in the furure? on petrol