Transportation is the largest source of greenhouse gas emissions in the U.S. and a leading contributor to harmful air pollution. The American Lung Association’s 2023 State of the Air report shows that more than 1 in 3 Americans live in communities with unhealthy air and that people of color are nearly three times more likely than white people to be breathing polluted air.

The last thing we need right now is vehicles being sold under weaker standards, since they'll remain on the road and contribute to climate pollution for the next 15 to 20 years. Let's tell EPA we oppose the delay and want to see Tier 4 Vehicle Emissions Standards implemented on schedule!