This is nonsense. More CO2 === faster plant growth is not some suppressed secret, this is basic science that people have known about for ages, and nobody is going to get labelled anything unless they're mentioning it as part of some bad faith argument.

Climate change deniers love stuff like this though, you can bring it up in a bullet point list of "why climate change isn't a big deal" or whatever and push your false narrative without any of the individual points being false. People who bring this fact up and are subsequently labelled climate change deniers are being labelled that because of the context and content of their whole argument, not because one specific true fact was mentioned.

It's also a bit disingenuous to talk about Patrick Moore as a Greenpeace Co-founder without any context about what he's been up to since 1986 when he left the organization. This is just an appeal to authority that's only tenuously linked to reality.

Stop being disingenuous just so you can feed your persecution complex with strangers on the internet.