In the 1970s, the concentration of ozone (measured in Dobson units) started dropping, and scientists discovered that ...

As existing CFC levels gradually decline, ozone in the upper atmosphere will rebound globally, and ozone holes will shrink.

But the longer the hole persists, the greater the likelihood that the ozone layer is dominated by natural factors, not human CFC emissions.” Another year has passed, and that stubborn Ozone Hole over ...

The ozone hole over Antarctica is the seventh smallest it’s been since the early 1990s. Recovery began with the Montreal Protocol, which ended the production of all chlorofluorocarbons (CFCs ...

By 1992, the hole was as large as North America. Alamy Researcher capturing air samples from the ozone layer above the Arctic What was happening was that chemicals called chlorofluorocarbons ...

CFC-11 was primarily used for home insulation ... ozone layer which protects us from ultraviolet light. A gaping hole in the ozone layer over Antarctica was discovered in the mid 1980s.

A new study published in the journal Atmospheric Chemistry and Physics reveals a 17-year delay in the projected recovery of ...

As a result of the widespread use of CFCs in consumer products, the ozone layer became depleted, particularly through a phenomenon that most of us know as "the ozone hole." The word "hole" should not ...

But if CFC's continued to go on unchecked, cold regions wouldn’t be the only casualty. By 2020: 17% would be gone worldwide and a similar ozone hole forms over the Arctic. By 2040 70% would be gone.

NASA modelling shows that the hole in the ozone layer would have covered the entire Earth by 2060 if CFC production had not been outlawed by the Montreal Protocol in the 1980s. Credit: NASA ...

After making the discovery of the ozone hole he became an energetic ambassador ... Their journal paper also recorded the ever increasing load of chlorofluorocarbons in the high atmosphere ...

CFCs were used as a refrigerant as they could absorb heat from around them, keeping your food cold. Image caption, A diagram of the ozone layer ‘hole’ above Antarctica. The danger of CFCs was ...