Carbon dioxide is a colorless, odorless gas. why is it considered a pollutant

Injuries in the environment are a result of

The picture below shows two galaxies. spiral galaxy and elliptical galaxy which of these statements best describes a similarity between the two galaxies? (2 points) both have elongated centers. both have centers shaped like bars. both change their shape from time to time. both are held together by gravitational forces.

Consider the table. types of bacteria form shape associated disease coccus x strep throat bacillus rod shaped y spirillum spiral cholera which best describes x and y?