Climate change, just plain natural fluctuations can have devastating effects on the micro-climates that make french wine so extraordinary.
Wine is a major part of French culture, but also a mainstay of french agriculture and the export economy.
Individual vintners are wise to be concerned.
But remember,one bad year does not a catastrophe make.
Bingo! I learned a lot of respect for French wines on recent visits — the generic table-wines I encountered there were rather a bit above the wines I encounter here (my Scottish blood is not ready to spend on the pricey stuff, wherever it comes from).