Harvard Report: Gas Taxes Not Vehicle Credits Necessary To Reduce Emissions

$7 gas is necessary according to a new report if transportation emissions are to be reduced to EPA targets by 2020. What's more, providing tax credits for electric and hybrid vehicles would backfire. The report recommends steep gas tax increases.

1 minute read

March 8, 2010, 10:00 AM PST

By Irvin Dawid


To meet the EPA's 2020 targets for cutting greenhouse gas emissions by 14%, the cost of gas would have to increase to $7 a gallon, according to a March report by researchers at Harvard's Belfer Center for Science and International Affairs.

"Most of their models assumed an economy-wide carbon dioxide tax starting at $30 a ton in 2010 and escalating to $60 a ton in 2030. In some cases researchers also factored in tax credits for electric and hybrid vehicles, taxes on fuel or both.

In the modeling, it turned out that issuing tax credits could backfire, while taxes on fuel proved beneficial."

'Tax credits don't address how much people use their cars,' said Ross Morrow, one of the report's authors. 'In reverse, they can make people drive more.'

"Researchers said that vehicle miles traveled will increase by more than 30 percent between 2010 and 2030 unless policymakers increase fuel taxes."

Thanks to Ron McLinden

Tuesday, March 2, 2010 in The New York Times - Science

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 4, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

White and yellow DART light rail train in Dallas, Texas with brick building in background.

DARTSpace Platform Streamlines Dallas TOD Application Process

The Dallas transit agency hopes a shorter permitting timeline will boost transit-oriented development around rail stations.

May 28, 2025 - Mass Transit

Group of five people sitting on blanket in park on sunny day having picnic.

Parks: Essential Community Infrastructure — and a Smart Investment

Even during times of budget constraint, continued investment in parks is critical, as they provide proven benefits to public health, safety, climate resilience, and community well-being — particularly for under-resourced communities.

June 10 - National Recreation and Park Association Open Space Blog

Close-up on older woman holding contented looking cat on her lap.

Porches, Pets, and the People We Grow Old With

Neighborhood connections and animal companions matter to aging with dignity, and how we build can support them. Here’s a human-scale proposal for aging in place.

June 10 - Shelterforce Magazine

Concrete staircase next to elevator in bright building with large windows.

Single-Stair Design Contest Envisions Human-Scale Buildings

Single-stair building construction is having a resurgence in the United States, where, for the last several decades, zoning codes have required more than one staircase in multi-story housing developments.

June 10 - Congress For New Urbanism

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.