President Obama had a complex relationship with environmentalists during his first term. Many bemoaned that he didn't fight for a climate bill the way he fought for health-care reform, and others grumbled about his mixed signals on issues like Arctic oil drilling and the Keystone XL oil pipeline. Obama often responds by citing his efforts to improve U.S. fuel-efficiency standards, and while his updated mileage rules may not put a big dent in climate change, they're still kind of a big deal — as the Department of Energy argues in this new infographic:

DOE fuel efficiency infographic

Infographic courtesy of Sarah Gerrity/DOE

Related fuel-efficiency stories on MNN:

The opinions expressed by MNN Bloggers and those providing comments are theirs alone, and do not reflect the opinions of MNN.com. While we have reviewed their content to make sure it complies with our Terms and Conditions, MNN is not responsible for the accuracy of any of their information.