Trends in global CO2 and total greenhouse gas emissions: 2018 report

In 2017, the warmest year on record of years without the occurrence of El Niño, and a year with normal global economic growth, the increase in global greenhouse gas emissions resumed at a rate of 1.3% per year, reaching 50.9 gigatonnes in CO2 equivalent. This was mainly due to emissions of CO2 and methane (CH4), which increased by 1.2%, after two years of almost no growth. With a share of about 73% for CO2 and 18% for methane, these emissions form the lion’s share of global greenhouse gas emissions (excluding those from land-use change).

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