The green blocks ought to be ' Cu2(OH)2CO3'，ought not to be ' CuO ', the real color of 'CuO' should be black.

2Cu+O2=======2CuO

2Cu+O2+H2O+CO2=========Cu2(OH)2CO3

Cu2(OH)~2~CO~3~============2CuO+CO~2~↑+H~2~O