Carbon Dioxide and Temperature Graph

1. What is the horizontal axis showing, and what is the range of values? It's showing how many years the graph is covering.
2.   The right.
3. What is the vertical axis showing, what are the units, and what is the range of values? The amount that the temperature has changed.
4. The graph was created from data that was gathered.  Does the web page state where the data came from? No.

Global Warming

I believe the fist one, mainly because it was just giving the facts, instead of trying to persuade us, like number 2 was. The facts in the first one seemed more genuine and fact worthy. The second one sounded ridiculous to me.