Scientists estimate that we've __________ about 40% of the world's oil.

On the flip side, we have __________ sun, water, and wind.

What if we could exhange our fossil fuel dependence for an existence based __________ on renewables?

For decades, we've __________ how to end our dependency on fossil fuels.

Global energy use is a(n) __________ and complex system.

Electricity powers all __________ of things in homes, businesses, and manufacturing.

Liquid fuels play a __________ role in almost all forms of transportation.

There is a(n) __________ supply of solar energy provided by the sun.

There are other __________ in the way, like efficiency and energy transportation.

Cities are __________ populated areas regions where energy demand is high.

There are other forms of renewable energy we can __________, such as hydroelectric, geothermal, and biomasses.

An efficient energy network would allow us to transport power from where it is __________ to where it is needed.

Building a new energy system on this scale faces a(n) __________ price tag.

The infrastructure for transporting energy would also have to change __________.

Power lines lose energy because wire material __________ energy through resistance.

Superconductors need to be cooled, which requires energy and __________ the purpose.

To be truly __________, electric batteries need to store more energy without adding cost.

A technological __________ towards new materials and better storage is required.

To find solutions, we'll need lots of __________ and powerful incentives.