Since the late 1970s a steady lowering of about 4 in the total amount of ozone in Earth 39 s atmosph...........

Environment and Ecology Envirnment and Climate Change

Since the late 1970s a steady lowering of about 4% in the total amount of ozone in Earth's atmosphere and a much larger springtime decrease in stratospheric ozone around Earth's polar regions, which of the following are the cause of ozone depletion?

1. Presence of Polar Stratospheric Clouds.

2. Presence of chlorine-containing source gases.

3. Extreme low temperatures.

Select the correct answer using the code given below:

1 and 2 only

1 and 3 only

2 and 3 only

All of the above

छोटे Courses बड़े Results

Master Envirnment and Climate Change

Prepare through Micro-courses

Try Now

Explanation:

Ozone is an inorganic molecule with the chemical formula O3. It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope O2, breaking down in the lower atmosphere to O2 (dioxygen). Ozone is formed from dioxygen by the action of ultraviolet light and electrical discharges within the Earth's atmosphere. It is present in very low concentrations throughout the latter, with its highest concentration high in the ozone layer of the stratosphere, which absorbs most of the Sun's ultraviolet (UV) radiation.