Haha. 50 years is naively optimistic. There's going to be widespread civil unrest due to food costs and shortages within the next 20 years, in most countries.

Agricultural productivity requires stable, predictable weather. As the weather and seasons continue to grow more extreme and less predictable, the global output of most crops will fall. This can only lead to inflation unless demand reduces proportionally to supply (many tens/hundreds of millions of excess deaths per annum). When I plan for retirement, I assume a rate of inflation double what it has been the last 30 years at the very least - that's my most optimistic scenario.

If the rain stops falling where the farms are, or where the lakes and dams can capture it, we're fucked. We can't desalinate the amount of water agriculture or cities require, without releasing significantly more GHG's, anytime in the foreseeable future.