Because a greenhouse prevents convective cooling, it doesn't magically heat up the inside by retransmitting radiation.
The air inside is warmed by the sun in the usual manner but is kept inside by the glass barrier, preventing it mixing with outside air which cools.
A very thin glass layer permits this, if science permitted, you could use an impossibly thin piece of glass for the same effect.
CO2 and other byproducts form a similarly thin barrier in the atmosphere preventing some of the heat being radiated outwards.
Most of this additional heat is absorbed by the oceans as is some of the excess CO2 which changes the ph.
The sea can only absorb so much, which is why ice levels/depth are relevant.
This subtle affect is what is driving the now (regular) extreme weather events.
We have detailed recordings from different studies of ice, land and tree cores that shows the varitations of CO2 over quite some time almost all of the increases attributed to industrialisation in modern times.
Very few sceptics deny the relevance of CO2 or the increase thereof, they usually just dispute the cause.
regardless, what do we have to lose by being more efficient, greener and kinder to the environment?
You don't have to go Uber-vegan and start wearing a hemp flightsuit.
Worst case is your grandkids get to breathe clean air and not have their downstairs turning into a swimming pool twice a year.
Fortunately it's all just one big hoax so nothing to see here, move along.
