The correct answer is (d). Modern refrigerators do not release ozone depleting gases during their industrial production.
Ozone depleting gases are chemicals that destroy the ozone layer in the Earth’s atmosphere. The ozone layer protects the Earth from harmful ultraviolet radiation from the sun. The release of ozone depleting gases has caused the ozone layer to thin, which has led to an increase in the amount of ultraviolet radiation reaching the Earth’s surface. This has increased the risk of skin cancer and other health problems, and has also damaged plants and animals.
Many countries have taken steps to reduce the use of ozone depleting gases. In 1987, the Montreal Protocol was signed by 197 countries. The Montreal Protocol is an international treaty that aims to protect the ozone layer by phasing out the production and use of ozone depleting substances.
As a result of the Montreal Protocol, the production and use of ozone depleting gases has declined significantly. However, some ozone depleting gases are still used in some products, such as refrigerators. Modern refrigerators do not use ozone depleting gases, but some older refrigerators may still contain these gases.
If you are concerned about the environment, you should choose a refrigerator that does not use ozone depleting gases. You can find this information on the product label.