The latest update to Carnegie Mellon University’s Power Sector Carbon Index (PSCI)— a quarterly report that tracks carbon dioxide (CO₂) emissions and intensity from the U.S. power sector — shows that 2017 U.S. electricity generation CO2 emissions were 27 percent below 2005 levels, as the following chart from the report illustrates.

Not coincidentally, the report also shows that natural gas’ share of the total electricity generation mix increased 67 percent during that time (760 to 1,270 million megawatts), helping power plant CO2 emissions drop to their lowest levels since 1988.

Read the full blog post on EIDClimate.org.