3. Snelgrove describes a fishing disaster that occurred where he grew up in Canada in an effort to explain how we are now experiencing "shifting baselines." Explain
what he means by this term.

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

Which structure in the cardiovascular system connect arteries to veins?

The wind speed in the region between cities a and b was probably the greatest at noon on which day?