Multiple Choice
To prevent the tipping point after which catastrophic environmental change will happen,what needs to be done?
A) Carbon dioxide emissions must be eliminated in the next two years.
B) Global greenhouse gas levels must peak no higher than 450 ppm and start declining by 2015.
C) All greenhouse gases need to immediately be reduced below their levels in 1990.
D) Carbon dioxide emissions must not rise more than 800 ppm,double the levels in the atmosphere today.
Correct Answer:
Verified
Correct Answer:
Verified
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