The electric vehicle has long been touted as a cleaner alternative to gasoline and diesel.
In fact, more than a third of all vehicles sold in the U.S. use it.
But a new report from the advocacy group Next Big Futures says the technology isn’t ready for prime time yet.
The study looked at the potential for an electric vehicle powered by coal to replace older, dirty fuel sources like oil and natural gas.
The report found that coal is still a critical fuel source for most electric vehicles, with a significant share coming from the U,S.
But the group also found that electric vehicles could be powered by natural gas, wind or solar, or other forms of renewable energy.
It found that while solar and wind power are the most competitive options, they can also be costly, and not all solar or wind power facilities are created equal.
As a result, the report calls for electric vehicle manufacturers to build and install more sustainable infrastructure in the next few years to make them competitive with conventional gas, oil, and coal-fired power plants.
To make that happen, the group says electric vehicle makers should start with a larger battery pack that can store excess energy for later use, or invest in electric-vehicle charging infrastructure that can capture more of the electricity generated by their vehicles.
Next Big Future is a nonprofit that helps the energy and environment communities by developing solutions to problems that are pressing the world.