Which hemisphere of the earth releases the most carbon dioxide into the atmosphere? why

The stratosphere. The lower boundary of the stratosphere is called the tropopause; the upper boundary is called the stratopause. Ozone, an unusual type of oxygen molecule that is relatively abundant in the stratosphere, heats this layer as it absorbs energy from incoming ultraviolet radiation from the Sun.

Ametal with a large number of free flowing electrons most likely has good conductivity