Before revision: Moreover, on average, played "a leading role in driving up GHG emissions in the past decade and are on the way to becoming the largest contributor" due to factors such as demographic transition, and high expenditures on carbon-intensive products like energy which is used i.a.
After revision: Moreover, on average, played "a leading role in driving up GHG emissions in the past decade and are on the way to becoming the largest contributor" due to factors such as demographic transition, , and higher use of carbon-intensive products like energy which is used i.a.