If we want to save energy then we need to change the way we behave. We need to buy appliances that are more (32) and can limit the amount of time we use them. To reduce the effect the greenhouse gases have on our atmosphere we should plant more trees. Trees can absorb carbon dioxide and so they help to counter the fumes produced by our cars. Turning off lights even for a few minutes can offset the negative effects of turning them on again later. CO₂ plays a critical role in (33)the balance in the Earth's atmosphere and the air that we breathe.It is also a waste product of the fossil fuels that almost every person on the planet uses for transport and other energy requirements. Because we create CO₂ every time we drive a car, cook ameal or turn on the light, the (34) of CO₂ in the atmosphere is rapidly increasing. The bestevidence indicates that we need to reduce carbon dioxide emissions by 70 per cent by 2050. We first invented the petrol pump in 1885 but it wasn't until 1988 (35) all new cars manufactured in the UK were required to use unleaded petrol only. Not only do fossil fuels pose an environmental hazard but there is also a pressing need to find an alternative energy source that is renewable. countries are exploring alternative energy sources such as solar energy or wind power. which uses large turbines to capture the energy of the wind. Question 32: A. competent B.proficient C. Efficient D.resourceful Question 33: A. preserving B. Reserving C.conserving D. Maintaining Question 34: A. proportion B.ratio C. Percentage D.rate Quétion35 A.which Bwhen C.how D.that Question36 A.much B.other C.many D. Another