You could invent a dramatically more efficient way to calculate hashes - after a short period of readjustment, the network would go back to consuming just as much power as it does now.
You could find a way of generating power more cheaply. The network will then use much more of it.
Energy requirements continue to grow until an equilibrium is reached. That equilibrium occurs when the energy cost to mine new blocks is commensurate with the value received from doing so.
However, miners who can externalise their energy costs will generally outcompete miners who cannot. Incentives to damage the environment and avoid taking resposnibility are built into the system.