Air pollution is a problem in most major cities, and this pollution has several causes. Factory and vehicle emissions are two of the most important ones, while industrial pollution also contributes significantly. Logging and clear-cutting are the least important factors out of the options, as they do not directly contribute to pollution. However, abundant trees reduce the impact of pollution on the ecosystem, so logging and clear-cutting are still to be controlled or discouraged.
The answer for this would be the individuals on the island would all appear very alike to individually or each other, and they may demonstrate uncharacteristically high incidences or manifestation of traits that are unusual in the universal human population.
