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4. Fill in the gap with a suitable word. The first letter of the word is given.

  1. The world is addicted to cheap, always available oil. It's a polluting s______ of e________, which is f_____ as its r_______ are running out.

  2. S_____ power is a viable alternative to f____ f____, as it gives off no carbon dioxide w______ and uses the natural energy from our sun to g________ electricity. After the lifetime of the panel, the materials that were used to make it could be r___________.

  3. Biomass is a clean r_________ energy s_________ derived from the w_____ of various human and natural activities. Biomass is r__________ as the sources contributing to biomass are always available. The use of biomass can be e__________ fr_______ because the biological mass is reduced, r_________ and then re-used.

  4. Wind power produces no pollution that can c__________ the environment, Since no chemical processes take place, like in the b______ of fossil fuels, in wind power generation, there are no harmful b_-p_________ left over.

5. Fill in the gaps with a suitable word or word combination.

The 1. ________ of Lake Chad's shrinking, say scientists and researchers, include its increased use for irrigation and drink­ing. But more important, they say, are changes in the region's 2.________, which have reduced the rainfall that once kept the lake and its rivers full. These changes, which are occurring in every part of the world, are now widely understood to be caused by 3. ________ activities, particu­larly those that use pollution-producing oil and other 4. ________ ________. Gases created by such activities are building up in the atmosphere, 5. ________ too much of the sun's heat and raising the earth's temperature — a process known as 6. ________ ________. As the earth 7. ________ up, it alters rainfall and other weather and cli­mate patterns, threatening human, animal and plant life with potentially dangerous climate change.

/Adapted from Africa Renewal. UN Department of Public Information. Vol.21 №2. July 2007/

6. Fill in the gaps with a suitable word or word combination.

After a decades-long debate over the 1. ________ and potential impact of global warming, a series of studies by 2,500 scientists from 130 countries, part of the United Nations-sponsored Inter­governmental Panel on Climate Change (IPCC), has finally laid the issue to rest. In February 2007 the IPCC provided over­whelming scientific evidence that the use of 2. ________ ________ like coal, oil and natural gas 3. ________billions of tonnes of heat-trap­ping 4.________ gases into the atmo­sphere every year, causing air, ground and ocean temperatures around the world to 5. ________ at an alarming rate.

Countries can reduce harmful 6. ________ and halt warming, noted IPCC Chairman Rajendra Pachauri in April, by investing in cleaner "green" 7. ________ and changing consumer habits. But it is too late to 8. ________ climate change from having sometimes severe impacts on the planet, and "it is the poorest of the poor in the world, and this includes poor peo­ple even in prosperous societies, who 9. ________ to be the worst hit."

/Adapted from Africa Renewal. UN Department of Public Information. Vol.21 №2. July 2007/

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