Grapes hit a “hot limit” where photosynthesis shuts down. Indeed, studies have predicted that, within 35 years, over 80 per cent of the present vineyards in France, Italy and Spain, and three quarters in Australia, will no longer be able to grow suitable grapes.
I think I call bollocks on that. For grapes are grown in Algeria currently and wine made from them.
I have a feeling that a great deal is hanging on that word “suitable” but that’s the one word that will get left out when people start shouting about it.
Perfectly willing to believe that some people will have to change the variety of grapes they grow in a certain area but that’s rather different from being able to grow none. Vines grow currently from that Algeria to, to my direct knowledge, Northern Bohemia. A 2 oC average global temperature change is not going to change that.