People in the market for used cars in New York may be interested in a recent study by Oxford University detailing the possible future of the automobile industry. According to the authors of the study, the most efficient way to reduce vehicle emissions in the short term is to downscale the size and weight of diesel and gas-powered cars.

Researchers at the Smith School of Enterprise and the Environment suggest that countries should not rely on manufacturers to produce and market electric or hydrogen-powered vehicles, as they are likely to remain niche products due to limited battery life and consumer expense.

The study’s authors believe that governments should impose taxes on owners of inefficient vehicles and invest money into public transportation systems.

“There is ample opportunity for emissions reductions by further improvements of currently available technology combined with a change in user habits,” said lead author Oliver Inderwildi.

He added that manufacturers will only stop selling large vehicles when consumers refrain from purchasing them. The report states that nations should not force manufacturers to provide a “silver bullet” to fix the world’s climate issue.