# Decarbonisation > The process of reducing [[carbon dioxide emissions associated with energy and electricity use, industrial processes and transport]], with a view to their eventual elimination. > > – Down to Earth newsletter > A fully decarbonised economy would require the use of 100% [[renewable energy]] and electricity, with correspondingly high degrees of [[energy efficiency]], [[energy storage]], a lower end use of energy, and a more expansive [[carbon sink]]s capable of rebalancing any residual greenhouse gas outputs from agriculture or other sources > > – Down to Earth newsletter ^ we should be reducing need for agriculture, also. not just carbon sinking it. > It is estimated that decarbonizing the US power grid alone will cost $4.5 trillion. > > – [[Mish-Mash Ecologism]]