8. What is the current atmospheric level of Co, what are major contributors of CO, emissions to the atmosphere, and what impact do the emissions have?

where is the scientific experiment?

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

what are the options? add them, then i will be glad to .