"double carbon", i.e. peak carbon 碳達峰|碳达峰[tan4 da2 feng1] and carbon neutrality 碳中和[tan4 zhong1 he2] / China's double carbon policy, announced in 2020, which aims to reach peak carbon use by 2030 and achieve carbon neutrality by 2060
碳
=
炭
+
石
:
Tecumseh (t) further processes the charcoal (炭) he made in the anthill's bathroom (an4) into pure carbon (碳) by crushing the charcoal (炭) into its elements and exerting extreme pressure with a rock (石).