Study the above graph showing sources of air
pollution. Fill in the blanks with the words, phrases or numbers provided
in the lists.
As far as the air pollution problem is concerned, Bangkok
does not seem much different from Mexico and Switzerland as its largest proportion
of air pollution is caused by
. From the above chart, they alone account for
per cent, whereas industry ranks
,
another 17 per cent. Third come
, which
another 14 per cent. The two other polluting agents are
and
, which
6 and 3 percent of the air pollution in this city
.