[palmer]

Will someone please tell me how CO2 increased 30 parts per million over the last 30 years is something to be concerned about?

It's not, but the rise is a bit over 2 ppm per year.

[Steven Tyler]

CO2 is 400 parts per million
That is AKA 0.000400 of 1 unit

Take a pencil and put four dots on a 8x11 piece of paper.
That is 400 parts per million, if the paper = i million

2 ppm = 0.000002 of 1 unit

Their is not enough CO2 in the atmosphere to raise/lower/keep in heat