Which gas directly increases the global temperature the most?

CO2 increases global warming temp the most followed by CFCs ( chlorofluorocarbons) which are used in refrigerators and ACs but now banned.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]