https://arstechnica.com/tech-policy/2022/04/16-states-sue-us-postal-service-to-block-purchase-of-gas-powered-trucks/

The US Postal Service is facing lawsuits from 16 states and several environmental groups challenging its decision to buy tens of thousands of gasoline-powered delivery vehicles instead of electric vehicles.

As previously reported, the Environmental Protection Agency says the gas-powered trucks being ordered by the USPS "are expected to achieve only 8.6 miles per gallon (mpg), barely improving over the decades-old long-life vehicles that achieve 8.2 mpg." The USPS countered that the vehicles get 14.7 mpg when air conditioning isn't being used and that the trucks' size will make it possible to deliver the same amount of mail in fewer trips.