CET6 Writing Model Test 7 Fossil fuels are the main sources in many countries,but in some countries the use of alternative sources of energy are encouaged.Is it a positive or negative development? Nowadays,people are attaching inportance to fuels.Because of the global warming,it's evidently that we should make a decision between fossil fuels and alternative resources. Fossil fuels,like coal,oil and gas,are made by ancient trees with million years creation.It's very easy to get and cheap,which become the main sources in many countries.But it produce much carbon-dioxide,causes pollution and destroy the environment.What's more,it's inalternative which means if we used up all fossil fuels,we will have nothing to use for our daily life. So scientists created some new alternative resouces.Such as sunlight,wind,biological alcohol.It's clean and do not produce any pollution.But on the other hand,it's expensive for global market and cannot get fully use of these resourses. In my opinion,as for developing countries,they should gradually eliminate fossil fuels and turned to using alternative fuels.As for developed countries,They should improve their technology and make these clean resources cheaper. (CET6 means College English Test Band 6.It's a test to examine Chinese college students' English level.If you pass this test,your English level is around IELTS 6.0.)