[zamfi]

Huh?

There are plenty of systems where the difference between 0.04% and 0.03% is dramatic, after all it’s an increase of 30% — and what matters is not the paltry decimal representation but rather the effects.

For example: consider concentration of sodium in human blood. The normal range is 0.31%-0.33% by weight. By 0.4% you’re pretty much dead.

Or consider chromium, an essential trace element: the normal amount is practically infinitessimal, in blood it’s 0.0000007% by weight, approximately. But not enough and you end up with diabetes or cardiovascular disease.

“0.04% vs 0.03%” is not an effective takedown of global warming.

[ddoeth]

Exactly. Represented as decimal numbers, we could also say that is only 0.0004 vs 0.0003, which looks like even less. Seeing that there is a 30% difference is the important thing here.