Thanks for the context. Unfortunately, it still doesn't really help understand the phrase, or more importantly, help it not sound stupid. I searched for that phrase, and the only place I can see it is in Chinese texts. I wonder if someone has written it incorrectly, then several websites have just copied it. I suspect it should have been 'foreseeable future'. The reason it sounds stupid, is that there is a suggestion that the future will be 'forested', as in 'covered with trees'. That's clearly wrong, as all over the world, the forests are being cut down, particularly by the population of those developing world countries.

A lack of formal education,however,doesn't constrain the ability of the developing world's workforce to substantially improve productivity for the forested future.

I agree with Kathy. It's meaningless without context. My guess is that it's metaphorical, but without context, that is just a guess.

Can you write out the entire sentence? This does not have meaning on its own.