[Publius6961]

But currently CO2 is about 350ppm, in 1950 it was about 300ppm. That's an increase of 14.2% just there. We need to keep our facts straight or we're no more credible then the other side.

You want to talk credible?
That's still 0.0012.
Only the ignorant fear what they don't understand.

Have at it.

By the way, the 1950 figure is arbitrary and meaningless. To have a grasp of the issue in a natural phenomenon billions of years old, you need a longer view than that.
"Normalcy" in nature is not defined as when you or your parents were born.
Never has; never will.

[Old Professer]

The ongoing measurements began as a crusade in the early 50s; see http://www.aip.org/history/climate/Revelle.htm

[Dinsdale]

By the way, the 1950 figure is arbitrary and meaningless.

Support your claim, it was independently measured by many scientists world wide prior to global warming being a concern.

BTW we have much longer baseline data from ice cores (again validated by multiple researchers). There is a clear trend starting at the industrial revolution.

That doesn't make it a problem. Fudging data is what the other side does, we don't need to.