What is clearly obvious to me (since I’ve read the physics behind the explanations – I do have a PhD in Physics by the way) is that CO2 doesn't absorb as much of the IR nor the UV spectrum as does water vapour. What is even more important is that water absorbs much lower frequencies than does CO2, which means that lower earth temperatures, radiating lower IR frequencies out into space, will get a 'greenhouse effect' from the presence of water in the atmosphere, but nothing from CO2. Also, there’s much more water vapour in the atmosphere than CO2. So it should be pretty obvious that the effect of changes in concentration of CO2 in the atmosphere is dwarfed by comparison to the effect of changes in concentration of water in the atmosphere.
So, a far more plausible explanation of global warming (at least up until a few years ago when the short term trend appears to have reversed, at least temporarily) is the increase in water vapour in the atmosphere. So what are we to do about it? Stop the possibility of using hydrogen powered energy sources since they pump water vapour into the atmosphere?
Seriously though, what could be causing the general increase in earth’s temperature in the recent past (excluding the recent falls)? Could it be the Sun? Could it be the change in the earth’s magnetic field, which has been shown can alter the earth’s ability to protect us from the Sun’s rays? Perhaps. We need more research to find the truth.
