Expression:
New battery technology may someday enable grid-level energy storage, making a renewable energy economy feasible.
Expression:
The world is slowly converting to electric cars, fueled by environmental concerns.
Expression:
The first electric planes are in development. Soon they could change the airline industry.
Expression:
California is leading the US's shift away from fossil fuels.
Expression:
Energy innovation will speed human progress during the 21st century as the world moves away from fossil fuel.