Heads and Valves confusion with Emissions?

Hi all,
Just noticed something in the latest Automation update. When highlighting different head/valve types in the engine builder, you get stats for each...fiction, emissions, etc. However, some of the emissions say "Very High" but it's in green.........wouldn't high emissions mean BAD for the environment, so shouldn't that be in RED? Or does it mean "high emissions" in the sense that it has low emissions output...?
Could somebody clarify the meaning here, because if it's the former, the colors seem a bit backward. If it's the latter, it should be re-worded?
Just noticed something in the latest Automation update. When highlighting different head/valve types in the engine builder, you get stats for each...fiction, emissions, etc. However, some of the emissions say "Very High" but it's in green.........wouldn't high emissions mean BAD for the environment, so shouldn't that be in RED? Or does it mean "high emissions" in the sense that it has low emissions output...?
Could somebody clarify the meaning here, because if it's the former, the colors seem a bit backward. If it's the latter, it should be re-worded?