Final answer:
Ozone depletion leads to d. higher levels of ultraviolet rays reaching the Earth's surface, which have negative effects on human health and disrupt ecosystems.
Step-by-step explanation:
d. Ozone depletion is a consequence of the thinning of the ozone layer, which occurs due to air pollution. This depletion leads to higher levels of ultraviolet (UV) rays reaching the Earth's surface. The increased UV radiation can have negative effects on human health, such as increasing the risk of skin cancers and eye cataracts.
Additionally, it disrupts the nitrogen cycle, kills plankton, and disrupts ocean food webs. It also has the potential to devastate most life if the ozone layer is completely lost. However, restrictions on pollutants have slowed down the rate of ozone depletion.