Study the following statements about ozone and state if it is true or false:
Its proportion in air is about3%.

Study the following statements about ozone and state if it is true or false: It absorbs ultraviolet rays.

Study the following statements about ozone and state if its true or false : It is essential for breathing of living organisms.

Study the following statements about ozone and state if the statement is true or false: It is used to disinfect water.