Ipeered out the window at the lengthening shadows of the trees. we had been on the road for six hours, but it felt like sixty given the appalling surface. i was now worried that we wouldn’t arrive before nightfall, and my fears weren’t by the driver’s eccentric behaviour. although it was dark, he still hadn’t turned the van’s lights on. through my translator i enquired why, yet i immediately wished i hadn’t. there weren’t any. fearing that we might all have to spend a night in the jungle, i ventured another question beloved of children everywhere. “are we nearly there yet? ” just one more hour was the reply. i checked my watch. sunset was in 10 minutes. fifty minutes on an unmade trail at 40 miles per hour. in the jungle. in the dark. just great.

3one of the biggest impacts a building has on earth is the energy it uses. currently, most of the world’s energy comes from burning fossil fuels. these fuels are dirty and when they are burned they pollute the air and water. one way to burn fewer fossil fuels is to reduce the amount of electricity a building has to use. passive solar heating, which uses heat from the sun, reduces the amount of fossil fuel used to heat buildings. passive solar heating requires a south-facing wall made of glass. when sunlight shines through the wall, it is collected and used to warm the building. another way green buildings reduce their electricity use is to install other energy sources. for example, some green buildings use panels that turn energy from the sun into useable electricity. which is the best summary of paragraph 3? a) fossil fuels are dirty and pollute the air and water. most of the world's energy comes from these fuels. b) the biggest problem of buildings is that they use fuel that is dirty for heating. they need to do something to be more energy efficient. c) panels that turn energy from the sun into electricity and passive solar heating can stop the burning of fossil fuels which pollute air and water. d) since fossil fuels are dirty and pollute the air and water, other technologies that pollute less and produce energy have been developed like solar energy and green buildings.