In a world that is increasingly run by computers, there are many ways that creative programming can lead to energy conservation. This can be as simple as a timer to dim or turn off lights, or as complicated as a program coordinating the motion of several thousand mirrors to concentrate sunlight on a single point. 

Solar roadways could power the nation:
Solar Roadways is a company that is using solar power, engineering, and programming to create a new kind of road that could work for transportation, power generation, power transmission, internet,  and emergency lighting all rolled into one!

Software plays a crucial role in solar thermal power:
Software turns out to be a vital component in making efficient solar thermal power plants. 

Programmers determine best arrangement for tidal turbines
Computer simulation provides best setup for hydrokinetic power generation from tides and ocean currents