>>>> If we were to build an off-world colony or "slowboat" starship
>>No need for an off-world colony.
>>Anyone who has been in a combat zone for a long period knows what it is to be deprived of "real" food.
>>I still don't take a fresh egg, or a fresh green vegetable for granted. Every time I eat them my enjoyment is enhanced by the recollection of the other stuff.
>>It kept us alive, but it was really awful.
>
>Climate change is going to have a major impact on our food and water supply in less than 20 years - many are going to have none at all.

We tend to presume that all climate change is bad.
Do you think that we'd be better off if we were still back in the ice age?