Around week eight, the embryo becomes a the kidneys, liver, brain, and lungs are all beginning to function. the fingers and toes are separate and the external genitalia are formed. a) fetusb) infantc) neonated) villus

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.