The knowledge gap exists not on the side of what to do (or what problems to solve) but rather on how to solve them.
Programs like drawdown
Programs like drawdown clearly outline the problems to be solved, and even suggest what the direct solution to them might be.
The lack of data and documentation is on the side of how people have either attempted to, or succeeded in, solving them.
Another issue seems to be funding. There's no shortage of good ideas to solve massive planetary problems. (Here's an example from MIT)
Again there doesn't seem to be any obvious answer for how the everyday person, with only their skills and a computer, can contribute to these problems.
Which makes me wonder, what are the characteristics of the kind of problem that can be solved that way?