Does Global Warming exist?

If so, how has it been measured, observed, and proven?

Anyone who doubts global warming need only thump their bible some more.
When 1000s of scientists, (i.e. People who went to college and do science for a living, unlike "well-informed" joe) agree that the earth is hotter than it should be according to their predicted climate curve over time, and notice that the shift started around the early 1900s, and that carbon emissions from the advent of electricity, automobiles, coal burning, etc. could play a role in trapping energy from the sun in the atmosphere, I think you should seriously consider what they are saying.