The line graph compares the amount of greenhouse gas emissions, in millions of metric tonnes, from five regions over a period of 20 years between 2000 and 2020, with expected emissions for the following two decades.
Overall, CO2 emissions have declined in Region 1, slightly fluctuated in Regions 2 and 5, but generally increased in Regions 3 and 4. In the future, these trends are set to continue, with Region 1 contributing the highest pollution levels throughout the given time frame.
In Region 1, greenhouse gas emissions were the highest in 2000 at 8 million metric tonnes. Following a peak of just over 9 million metric tonnes in 2010, the figure is expected to decrease to 7 million metric tonnes by 2040. In contrast, Region 5 reported the lowest emissions over the whole period, fluctuation between 0.9 and 1.9 million metric tonnes of CO2 produced.
Similarly, Region 2 emissions also ranged between 5.8 and 6.3 million metric tonnes, beginning at 6 million metric tonnes and expected to produce at the same level by 2040. Regions 3 and 4 show consistent growth over the first two decades from 4 million metric tonnes and 2.8 million metric tonnes, respectively, with the exception of slight drops in 2005 for Region 3 (3 million metric tonnes) and in 2025 for Region 4 (3.8 million metric tonnes). For the next two decades, CO2 output from both of these areas are forecast to increase to their highest points, 6 million metric tonnes for Region 3 and 5 million metric tonnes for Region 4.