Question

Answer 1

41. Solar panels are quite expensive to install but we well save money on electricity in the end.

42. China produces the largest wind power in the world.

43. Coal is more expensive and polluting than natural gas.

44. We are looking for cheap, clean and effective sources of energy.

45. I'm going to buy a hybrid car because it uses less gas than other cars. 

Answer 2

41 Solar panels are quite expensive to install, but we will save money on electricity in the end

42 China produces the most wind power in the world

43 Coal is more expensive and more polluting than natural gas

44 We are looking for cheap, clean and effective sources of energy

45 I'm going to buy a hybrid car because it uses less gas than other cars