b. better housing
c. child labor
d. improved clothing
the answer is Focusing on your ultimate goal
The health risk which is induced by the high concentrations of air pollution includes infection of nasal passages, asthma, shortage of breath, respiratory infection, lung cancer, heart disease, etc.
Air pollution may be defined as the existence of unwanted or contaminated impurities in the air of a substance that has dangerous or toxic effects on the health of organisms.
Following measures should be taken on an individual basis to prevent or reduce problems associated with air pollution:
Thus, it is well described above.
To learn more about Air pollution, refer to the link:
#SPJ5