Examlex
Which of the following diseases cannot currently be prevented by vaccination?
Stratosphere
The layer of the Earth's atmosphere just above the troposphere, known for its ozone layer which absorbs and scatters harmful ultraviolet sunlight.
CFCs
Chlorofluorocarbons, man-made chemical compounds once commonly used in refrigeration and aerosols, known to deplete the ozone layer.
Years
Units of time based on the period Earth takes to orbit around the Sun, approximately 365 or 366 days.
Cumulative CO₂ Emissions
The total amount of carbon dioxide released into the atmosphere over a specified period of time by human activities.
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