My opinion piece published in The Detroit News points out the inconsistency of how some automakers have advocated for weaker fuel economy and GHG emission standards even as they promote their technology innovations. Taking General Motors' recent public statements as an example, it reminds readers that what ultimately matters for reducing emissions is the stringency of the regulations that apply across the entire vehicle fleet.
Examining ways to mitigate carbon emissions from automobiles and other forms of transportation.
Tuesday, January 5, 2021
Monday, October 19, 2020
Light trucks overwhelm EVs' carbon-cutting benefits to date
Electric vehicle sales have grown rapidly over the past several years. In 2012, only about 53,000 EVs were sold in the United States, counting both battery electric and plug-in hybrid models. By 2018, the annual tally of new EVs sold in the United States reached 361,000. It then tapered to 327,000 in 2019, the last full year of data before the 2020 pandemic. The vast majority of EVs are Teslas, with the big jump in 2018 due to the introduction of the Tesla Model 3. With overall light vehicle sales on the order of 17 million per year (pre-pandemic), EVs comprised about 2% of the U.S. market as of 2019.
Friday, July 17, 2020
A missing link in green car marketing
Nevertheless, environmental need -- and indeed policy-fostering public sentiment to address global warming -- does not go down when pump prices fall.
Wednesday, April 22, 2020
Earth Day and auto efficiency
On Monday March 9, 2020, just before the coronavirus lockdown, I hosted a pre-Earth-Day teach-in on auto efficiency. It was part of the commererative week of action that the University of Michigan had planned to celebrate the 50th anniversary of the first Earth Day, April 22, 1970.
Monday, February 18, 2019
Considering petroleum's grip on mobility
Thursday, November 15, 2018
Can the Trump administration pull off a clean car deal after all?
In response -- and they were indeed prepared for this worst-case scenario -- the State of California and its allies have girded for legal battle. They filled the docket with comments and extensive supporting analysis designed to fight the administration's crippled standards in court. On the other side, automakers -- who had prompted the administration to revise the regulations -- hailed the Trump agencies regulatory reform process even though they said it weakened the rules even more than they wanted. At that juncture, it seemed like years of litigation might be inevitable.
Nevertheless, a look at the formal comments filed reveals the makings of a compromise peeking through the otherwise disparate views. Recent news stories report that serious negotiations between California and the Trump administration seem to be underway. My recent Axios piece muses about how a compromise on car standards could be in sight.
Monday, October 8, 2018
Pondering the future of the car with the planet in mind
Historically, however, Flint is one of the cities that gave birth to the automobile. William Durant, a key co-founder of General Motors, and his partner Josiah Dort opened a factory for making horse-drawn carriages there in 1886. That building subsequently became an early factory for Durant's car company before falling into disuse in 1924. Five years ago, General Motors purchased the building and named it Factory One, turning the refurbished structure into a museum and event space.
This location served as a fitting venue for an evening plenary on the Future of Cars held on October 3, 2018, the first day of the SEJ conference. Moderated by Jim Motavalli, the panel included Michelle Krebs, a leading automotive analyst, Mike Ableson, a GM vice president involved in the company's electric vehicle efforts, and myself.
Monday, October 1, 2018
Reconsidering bioenergy
![]() |
| Accelerated restoration in progress at the Malheur National Forest, Oregon [photo: U.S. Forest Service] |
Protecting the Earth's climate takes on greater urgency every day. The vast majority of carbon dioxide (CO2) and other climate-wrecking greenhouse gas (GHG) emissions comes from the unmitigated use of fossil fuels. But that doesn't mean that every form of alternative energy is helpful for the planet. Case in point: bioenergy, such as liquid biofuels to replace oil or forest products to replace coal.
Indeed, using biomass for energy at large scales does not belong on the short list of actions to take for climate protection. This is the conclusion of a commentary by Bill Schlesinger and myself just published in the Proceedings of the National Academy of Sciences. Given the real-world limitations of not only technology but also land-use governance, we argue that the priority policymakers have given to promoting bioenergy is profoundly misplaced.
Tuesday, September 25, 2018
No justification for weaker CAFE standards
This week the administration is holding public hearings on their proposal to weaken Corporate Average Fuel Economy (CAFE) standards after 2020. What follows is the comment I prepared for the hearing being held today in Dearborn, Michigan.
Comment on CAFE and GHG Standards Proposed Rule
for MY 2021-2026
John M. DeCicco, Ph.D.
University of Michigan Energy Institute*
Thank you for the opportunity to present this comment today.
Having reviewed the proposed rule, I find that it fails to scientifically or economically justify freezing the standards for model years 2021 through 2026. My assessments show that the greenhouse gas emissions and fuel economy standards for those years remain sound.
My overarching conclusion is that there is no justification for changing the standards.
The one new development with any significance is that fuel prices are lower now than projected. However, this does not justify weakening the standards. Lower prices are all the more reason why fuel economy and emission standards should remain untouched.




