Question

look again at the graph showing global co₂ emissions between 1965 and 2015.
global co₂ emissions
scientists from the intergovernmental panel on climate change have recommended that countries work together to reduce global co₂ emissions. the scientists suggest reducing co₂ emissions to about half of what they were in 2010.
use the data to complete the statements.
to meet scientists recommendations, total global co₂ emissions should be reduced to about ______ million metric tons.
22,000 34,000 16,000
the last time that global co₂ emissions were at or below this level was in the ______.
1970s 2000s 1990s

Explanation:

Step1: Determine CO₂ emissions in 2010

From the graph, in 2010, CO₂ emissions are approximately 32,000 million metric tons.

Step2: Calculate half of 2010 emissions

Half of 32,000 is \( \frac{32000}{2}=16000 \) million metric tons.

Step3: Locate the time period for 16000 emissions

Looking at the graph, emissions of 16000 million metric tons or below last occurred in the 1990s.

Answer:

16,000; 1990s