By the end of 2012,atmospheric greenhouse gases had again reached new highs-the highest levels in 800,000 years.In the twentieth century,average world temperature rose by 0.7°C.If current trends continue,scientists expect that the average range of temperature increase by the year 2100 will be
A) 0.5-0.7°C.
B) 0.7-1.0°C.
C) 0.8-1.8°C.
D) 1.0-2.0°C.
E) 1.8-4.0°C.

Question

Quizplus · Accepted Answer

Scientists project that if current trends continue, the average global temperature could increase by 1.8 to 4.0°C by the year 2100 due to the continued rise in greenhouse gas emissions.

By the End of 2012,atmospheric Greenhouse Gases Had Again Reached