Notice that it’s in parts per million. The red is only about 18 ppm higher than the yellow. I’m no scientist but this seems like a very tiny difference..
Yes, all their measurements are in parts per million. That is why when I start arguing with a globalwarmist I always ask them if they know what percent of the atmosphere is CO2. They usually don’t and are usually amazed when I explain that 400 ppm is 40 molecules per 100,000, 4 per 10,000 etc. Then on top of that, when it is claimed that we (humans) produce about 4% of that, so out of 400 molecules in 1,000,000, we are responsible for 16 - come on, REALLY? Then they usually give up and realize they’re being lied to.