Which of these has been controlled in an attempt to reduce the depletion of ozone in earth’s atmosphere?
methods of filtering gasoline
use of chlorofluorocarbons (cfcs)
use of mercury (hg) compounds
methods of radioactive waste storage

Ineed the answer asap. in order to be considered alive, an organism must simultaneously possess the characteristics of homeostasis, heredity, cells, reproduction, and

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

The third stage of cellular respiration is (2 points)