Originally Posted by
KerrAvon
Yes, plants need CO2 to grow and increasing levels will increase plant growth (commercial greenhouses often have artificially elevated levels of CO2 in them).
Plants also need water to grow and droughts will stop them (there’s a thread on here about the price of olive oil, which has shot through the roof because of drought and excessive heat in the Mediterranean last year). They also need oxygen to grow and there are worries in the UK about the extent to which the winter cereal crops in the UK have been damaged by effectively being drowned in waterlogged fields during the winter and early spring of this year.
It's important not to confuse weather with climate, but there is a clear trend of rising global temperatures, which will inevitably affect ecosystems and agriculture.
Climate change will also drive human migration, which is a concern of the OP.
And of course, there is another reason to switch to renewables, which is that oil, coal and gas are finite (unless you believe some of the wackier theories that propagate on the internet). That means the price is only going to go one way.