The issue, we are told, is CO2 levels now breaking the 400 ppm 'barrier' as though it is written that >400 ppm = DEATH
This is the dread pirate 'Greenhouse Gas' and it is a wonderful example of how repeating something that is wrong long enough will work to make it truth. First of all, greenhouses don't give off CO2. They give off O2, sometimes referred to as 'oxygen' so, the common reference of 'greenhouse gas' is wrong. 180 degrees wrong. Not a little wrong. Totally wrong. Second, greenhouses ABSORB CO2. Yes, that's right folks. Junior High biology, photosynthesis. Sun, water, a little food, warmth and we have...plants. That's what greenhouses are for, to grow green things. That absorb CO2 and give off...oxygen.
Further, the argument that 'greenhouse gases' means to 'trap' greenhouse gases, which don't come from greenhouses, back to CO2, is to not have ever been in a greenhouse. Ever. Greenhouse have vents. They are opened and closed as conditions require. It's great on a cold day. Or a rainy one. I'll grant you it's warm in the summer...when it's hot OUTSIDE. But, if we're talking about 'trapping' gases, a greenhouse is an awful example. They're leaky. They have VERY low insulation abilities. They're the last thing you'd choose as an example of trapping gases of any kind never mind ones they don't even produce.
So, back to CO2, plant growing stuff, as 'climate changer'. Again, photosynthesis, plants absorb CO2. They consume the carbon in it to grow. A greener planet needs CO2. Plants like CO2 all the way up to 1,000 ppm. Many plants will like it just fine beyond that. CO2 levels in your house are probably around 1,000.
So, the question we should be looking at is research on 'elevated' CO2 levels, exhaust gases if you'd like a snappy name, and the likely long term effect on the environment. Giving we've been looking at it completely wrong for some time now should mean lots of room and money to start looking at it scientifically instead of emotionally.
As a suggestion.