Some refrigerants used in air conditioners have been associated with smog destruction of the ozone layer thermal pollution power failures

The correct answer is B. Destruction of the ozone layer

Explanation:

The ozone layer is the layer of the atmosphere that absorbs UV rays from the sun, indeed this layer absorbs around 98% of these rays. Due to this, the depletion of this layer can lead to skin cancer in humans and other negative consequences that are the result of UV rays. Unfortunately, in the last decades, this layer has been depleted or reduced mainly due to the use of chlorofluorocarbons that are substances found in aerosols and refrigerants including those used in air conditioners. Therefore, some refrigerants used in air conditioners have been associated with the destruction of the ozone layer.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

the correct answer would be d. hope this !