in the 1980s, international bans on led to the of the ozone layer
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The sentence is discussing something that happened in the 1980s involving international bans and the ozone layer. The blanks likely pertain to what was banned and the effect it had on the ozone layer. Show more…
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In the 1970's, when ozone depletion and the ozone hole first started appearing in the news, many non-scientists were worried that ozone might "run out." Use the concepts of equilibrium to explain why this can't happen, and why ozone levels are returning to pre-1975 levels.
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During the 1970 s and 1980 s, the buildup of chlorofluorocarbons (CFCs) created a hole in the ozone layer over Antarctica. After the 1987 Montreal Protocol, an agreement to phase out CFC production, the ozone hole has shrunk. The ODGI (ozone depleting gas index) shows the level of CFCs present. $^{21}$ Let $O(t)$ be the ODGI for Antarctica in year $t ;$ then $O(2000)=95$ and $O^{\prime}(2000)=-1.25 .$ Assuming that the ODGI decreases at a constant rate, estimate when the ozone hole will have recovered, which occurs when $\mathrm{ODGI}=0$
Rate of Change: The Derivative
Interpretations of the Derivative
During the 1970 s and 1980 s, the build up of chlorofluorocarbons (CFCs) created a hole in the ozone layer over Antarctica. After the 1987 Montreal Protocol, an agreement to phase out CFC production, the ozone hole has shrunk. The ODGI (ozone depleting gas index) shows the level of CFCs present. $^{8}$ Let $O(t)$ be the ODGI for Antarctica in year $t ;$ then $O(2000)=95$ and $O^{\prime}(2000)=$ -1.25. Assuming that the ODGI decreases at a constant rate, estimate when the ozone hole will have recovered, which occurs when ODGI = 0.
Key Concept: The Derivative
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