Because most air pollution in the developed world is associated with transportation and energy production, the most effective air pollution strategy would be measures, such as reducing electricity consumption, insulating homes and offices, and developing better public transportation.

CONSERVATION MEASURES

Explanation:

A Conservation measure is any approach that follows thoroughly the  assessment of  the components involve in the planning, action and monitoring of  the conservation cycle to achieve better  results. it involves undergoing a change about how effective an intervention  can cause desirable outcomes  by using well articulated measures that are feasible to curb the detriments of the subject to be conserved.

Here, since  most air pollution are  associated with transportation and energy production, it would be effective to use conservative measures so to curb the negatives of air pollution and utilizing safer strategic measures, by reducing electricity consumption, insulating homes and offices, and developing better public transportation.

the president has the power to appoint federal judges, ambassadors, and other "principal officers” of the united states, subject to senate confirmation of such appointments.

the answer to your question is,

d. when a child was born.

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