Reasons why greenhouse effect and ozone layer depletion are considered two-related serious environmental concerns of the 21st century

The main public concern regarding the ozone hole has been the effects of increased surface UV radiation on human health. ... Ozone depletion would magnify all of the effects of UV on human health, both positive (including production of vitamin D) and negative (including sunburn, skin cancer, and cataracts).

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker

the answer for this question on edg. is 8/5