Exhaust from motor vehicles is the number one cause of what?

acid rain
carbon monoxide pollution
sulfur dioxide pollution
mercury poisoning

How might weather forecasting people who work as farmers and fishers? how does it everyone

Which are reasons cells undergo cell division?

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.