What is a power that the President gained through the development of technology?

I’m writing about how technology has informally changed the Constitution. I’ve said that electronic communication and the development of atomic weapons has given the president’s role as commander in chief more significant and his role in the constitutional system more defined. Now I need an example of a power that the president has gained because of the increase in technology.

What would be the best technology for producing electricity from cattle dung?

I am planning to start up a power plant of 1 MW. I have availability of Dung of 80 Tons per day. What would be the best technology to recover energy from such dung out of following technologies:
1.Anaerobic Digestion/Biomethanation
2.Pyrolysis/Gasification
3.Combustion/Incineration
The technology should result in maximum energy in form of heat/electricity and overall operational and economic efficiency. Thanks and regards, Manthan.