Over time, pollution generally leads to which of the following?
a. healthier plants
b. healthier animals
c. a decrease in population of some plants and animals
d. an increase in human population

The basketball coach tells his team to run sprints back and forth across the court, which is 30 m long. they start at the left end of the court, run back and forth 6 times, then end back at the left end of the court where they began. what distance did they run? what is their displacement?