User: Are electric vehicles better for the environment than cars powered by fossil fuels?
Assistant: The rise of electric vehicles (or EVs) has been fueled by many factors -- including innovation, acceleration, design and tax breaks -- but the underlying assumption that electric vehicles are less harmful to the environment and may even mitigate global warming has been a primary motivator for hundreds of thousands of buyers.

Despite the virtuous aura of owning an electric vehicle, the jury is still out on whether EVs have a net positive impact on the environment or will do anything to curtail climate change.  That's because, while the experience of driving an EV may feel like a zero-compromise embrace of green energy, the vast industrial network needed to build and power EVs diminishes the halo effect. On the other hand, the fossil fuels that power traditional vehicles are definitely contributing to global warming and leave the world vulnerable to oil shocks and pressure from oil-producing countries. 

Whether EVs are better or worse for the environment is still to be determined. But a more insidious trend is the growing size and power of electric vehicles. Smaller vehicles, traveling fewer miles, represents a proven formula for reducing emissions and reversing climate change. But already, we're seeing the advent of electric trucks and SUVs, which are heavier, loaded with bells and whistles so they require more and more power to move people around. Coupled with the problem of drivers feeling like their EV gives them the right to drive as much as they want and you can see a reality emerging where the problem of Americans driving giant gas guzzlers is being replaced with American driving giant, power-sucking EVs. And that's leading us even faster down the road to environmental disaster.