Writing task1 The given graph illustrates the levels of ozone in one city on 15th July between 1982 and 2012

Overall, it can be concluded from the graph that the levels of ozone us considerably more in 2002 and 2012, while between 1982 and 1992, this level experiences by far the lowest proportion. To begin with, micrograms at 0. 02 were almost the same all year. By 6. 00, the microgrms peaked at 250 in 2002 and 2012, and also dropped to 150 by 17: 00. So, at 0: 00 it was slowly descended to 100. On the other hand, in 1992, however, at 50 it went in the same direction and rose slowly to 12. In 1982, it dropped slightly from 50 and rose again at 12: 00, 1982 and 1992 began to rise slowly.