A new analysis casts doubt on whether scientists can precisely estimate how much nations' combined emissions-cutting pledges will stem global warming, instead showing a wide range of potential outcomes.
Why it matters: World leaders need to know if emissions targets currently on the table would meet the Paris Agreement's temperature goals or if more stringent commitments are needed. The new study shows they may be placing too much faith in temperature projections.
New EPA data on U.S. vehicle fuel economy paints a mixed picture, showing record average efficiency in model year 2020 that's nonetheless far short of what policymakers hope to see ahead.
Driving the news: The annual report shows that average overall fuel economy for cars, SUVs and light trucks sold in the U.S. reached 25.4 miles per gallon (mpg) in model year 2020 in real-world conditions, a 0.5 mpg increase over 2019.
A new(ish) analysis shows that "fuel economy progress is stalling" amid the growing global popularity of SUVs and light trucks.
Driving the news: The joint report from the Global Fuel Economy Initiative (GFEI) and the International Energy Agency takes stock of where things stand through 2019, the last year with comparative data.
