Avoiding pollution can be a full-time job. Try not to inhale traffic fumes; keep away from chemical plants and building-sites; wear a mask when cycling. It is enough to make you want to stay at home. But that, according to a growing body of scientific evidence, would also be a bad idea. Research shows that levels of pollutants such as hazardous gases, particulate matter and other chemical“nasties”are usually higher indoors than out, even in the most polluted cities. Since the average American spends 18 hours indoors for every hour outside, it looks as though many environmentalists may be attacking the wrong target.
Many people find their rewards unfair, especially when comparing these super salaries with those of top surgeons or research scientist, or even leading politicians who have the responsibility of governing the country. However, sports salaries are not determined by considering the contribution to society a person makes or the level of responsibility he or she holds. Instead, they reflect the public popularity of sport in general and the level of public support that successful stars can generate. So the notion of ‘fairness’ is not the issue. ——（《剑桥雅思6》）
长句（Many people find ……responsibility of governing the country.）短句（So the notion of ‘fairness’ is not the issue.）相得益彰，大词（responsibility）小词（so）交相呼应，逻辑关系（comparing, however, instead）清晰明确，是考生们学习效仿的绝佳素材。