Alison Jane does not know:

1. That the burning of fossil fuels like coal, oil and gas will create CO2.

2. That CO2 when trapped in the atmosphere will produce the greenhouse effect.

3. What the greenhouse effect is.

4. That the greenhouse effect will cause heat to be trapped and stored in the atmosphere.

5. That the greenhouse effect exists.

Alison, don't put too much time or thought into what Mr O has to say.
He has been warned so many times that he has stretched our patience and our intellect to the limit.
He thinks that repeating the same thing over and over like a broken record, will suddenly make it true.
Maybe to someone like him, because that's probably why he does it, but not everyone else.
Anyway, I might suggest not responding to him or just putting out a broadcast response which gives you the opportunity to say what YOU want to say without having to suffer through his annoying, ramblings.

Unsurprisingly, it turns out that Mr O himself does not know, the very stuff he has been saying that others don't know about.

Let's see; Burning of fossil fuel will create CO2. Old news!
The CO2 trapped in the atmosphere will produce the greenhouse effect.
NO, we need much more CO2 than we can squeeze out to make any real contribution to greenhouse effect. What we are doing is not worth even mentioning let alone measuring, in the greater scheme of things, so again, WRONG!
Suggesting anyone doesn't know what greenhouse is by now, only shows how stupid the questioner is. So again FAIL!
I think we have already answered this one that we know if enough CO2 trapped will trend to a warmer more humid climate. This is a GOOD thing, but unfortunately we do not produce enough to make it worthwhile to even mention it.
We already know there is such a thing as greenhouse. There is just not enough, nor is there likely to be enough, any time soon to be talking about it and certainly not to do ANYTHING about it!

Climate Change 1967

https://www.youtube.com/watch?v=rznY8Op5jFM

climate change February 2020, its all wet, two months ahead of the BoM climate models.. Whoops!

Mr Opinion does not know.

1. The earth warms and cools in regular, repeating, 1000 year cycles.

2. The last warming period was 1000 years ago.

3. This present warming period just happens to have coincided with the industrialisation of the human race.

4. Obviously, anthropogenic CO2 had nothing to do with hundreds of other previous, cyclical, warming periods.

5. 570 million years of global temperatures shows no direct causal link to known atmospheric CO2 levels.

http://www.researchgate.net/figure/Global-Temperature-and-CO2-levels-over-600-million-years-Source-MacRae-2008_fig1_280548391