i’m on the last question and i’m stuck! i need this handed in to pass! please help! thank you

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Which of these conditions most likely produces an unstable isotope?

Helium decays to form lithium. which equation correctly describes this decay?