Why are holes in Earth's Ozone layer a problem?

Holes in the Earth's ozone layer is a problem because the ozone layer controls the amount of ultraviolet radiation that humans are exposed to. These levels of radiation can cause skin cancer, sight problems, and immune damage.

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economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.