decarbonise

Verb

decarbonize (third-person singular simple present decarbonizes, present participle decarbonizing, simple past and past participle decarbonized)

1. (transitive) To clean hard sooty deposits from inside an internal combustion engine.
   • During the overhaul, the cylinder heads were found to be reusable, as long as they got a good cleaning to decarbonize the valve seat areas.

   Synonyms:

   decoke

2. (transitive) To remove carbon content from iron or steel, either intentionally or accidentally, as by (for example) overheating steel in the presence of air, destroying its former temper and hardness.
   • A blast furnace decarbonizes iron enough that it can be used as input to a steelmaking furnace.

   Synonyms:

   decarburize

3. (intransitive, transitive) To reduce or replace fossil fuels by renewable energy in energy production and distribution systems.
   • Efforts to decarbonize the automotive fleet are challenging, but no one wants nightmare-grade climate change, either.