Ensuring a clean energy future for the United States requires a stronger electricity grid — one that can move more power over longer distances while also supporting new loads like electric vehicle charging and energy-intensive industrial processes, and providing reliable service through more extreme and variable weather conditions.

Decarbonization models suggest that the transmission system will need to double in capacity or more — not necessarily twice as many lines, but twice as much capability of carrying power over distance. More high-power lines would mean fewer miles added, and existing electrical lines can be upgraded to get many more times the power through the same or similar land footprint.