Later some non-science person thought that the gas floated to the top of the atmosphere to form a layer like the glass in a greenhouse. The popular view is that the atmosphere has some sort of layer of carbon dioxide up there that reflects heat back down to Earth rather than letting it escape to space.
The function of the human arm is to be able to reach objects with your hands.he function of the arm in the microscope is to support the tube  and connects it to the base. It is also use to transport the  microscope from place to place. 2 people found this useful. Edit.
Otherwise the braachialis, a synergist to the biceps, does most of the work.       The humerus is the bone of the arm. The arm in anatomy refers only to the top part of the upper limb between the elbow and the shoulder. The humerus allows you to reach, pull, lift, push and rotate objects.