Global Warming= Increase in temperature of Earth.
It is agreed that global ^C is increasing- during 1900 average global ^C increased by 0.6^C. (Note that it wasn't until 1860 that accurate readings became- thermometers had came about). Since 1860, global ^C is generally dramatically increasing, but it is also fluctuating.
Greenhouse gasses: CO2, N2O, CH4, H2O(g). Modern increase a result of human activity.
Greenhouse effect: …