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  2. Green Vehicle Guide

What If: Ideas for Reducing Transportation Greenhouse Gases

The future holds immense potential for reducing transportation carbon pollution while maintaining or improving accessibility to the places, goods, and services we enjoy today. Consider an example from the recent past. Twenty years ago we drove to video stores, but now we can download the latest movies instantly on our computers and televisions—saving time and car trips. While we can’t always predict the future, we can help shape it.

What If? Scenarios

What If? logo with icon of bike, fuel pump, and car.

Take a look at our What If Scenarios below. They are brief thought starters, exploring technologies, fuels, and strategies that may be far off or even seem far–fetched. Others could be implemented today. And check back regularly as we add more ideas and keep asking What If …

  • What If Electric School Buses Could be Used to Supply Power When Off Duty?
  • What If One of Your Cars was Electric?
  • What If Airplanes Looked Like Stingrays?
  • What If More People Bought Groceries Online Instead of Driving to a Store?
  • What If Garbage Fumes Powered More of Our Cars, Trucks, and Buses?
  • What If We Drove Our Most Efficient Car?
  • What If We Kept Our Cars Parked For Trips Less Than One Mile?

Green Vehicle Guide

  • Learn About Green Vehicles
    • What is a Green Vehicle?
    • Consider a SmartWay Vehicle
    • EVs and Plug-In Hybrid EVs
    • EV Charging - The Basics
    • EV Charging – The Details
    • Setting up Home EV Charging
    • Tips for EV Drivers
    • EV Myths
    • EV Testing
    • Hydrogen in Transportation
  • Help Make Transportation Greener
    • Compare Your Gas Car to an EV
    • True Cost of Car Ownership
    • Buy Green / Save Green
    • We've Done Big Things. We Can Do Big Things.
    • Promoting Green Vehicles
    • Advanced Gas and Diesel Vehicles
  • Vehicles, Greenhouse Gases & Smog
    • Smog Vehicle Emissions
    • GHG Emissions from a Typical Passenger Vehicle
    • Fast Facts on Transportation GHG Emissions in the US
    • Routes to a Lower GHG Transportation Future
    • Automotive Trends Report
    • 50 Years of Automotive Trends
  • Fuel Economy
    • Learn about the Fuel Economy Label
    • How MPG Affects Fuel Costs
    • Your Mileage May Vary
    • Testing at Our Lab
  • Transportation Down the Road
    • Self-Driving Vehicles
    • Shared Mobility
    • What if: Ideas for Reducing Transportation GHG
  • Find a SmartWay Vehicle
  • Sign up for E-Updates
Contact Us About the Green Vehicle Guide
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on February 7, 2025
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