Is the trait being tracked in the pedigree a dominant trait or a recessive trait? Provide specific evidence from the pedigree (in terms of generation and individual’s numbers) and reasoning to support your claim.

The trait being tracked is a recessive trait because less people have it.

7 people don't have it and 5 people do.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.