[JimRed]

When I tell them that CO2 is only 0.04%...

Make it easier on them; express it as four tenths of one percent. Otherwise they'll take away anything from four percent to forty percent when they hear zero point zero four!

[rktman]

With pictures/graphics it so easy that even a liberal could understan.............. Never mind. They don’t want to hear/see it.

[Moltke]

Make it easier on them; express it as four tenths of one percent.

That would be four hundredths of one percent. Yeah, math is hard... Just tell them "almost nothing" next time.