Polls have a margin of error and election results have generally been within the 80% confidence interval 80% of the time.
It is true that when there are less polls (like in special elections) it’s harder to get an understanding of the state of the race.
I’m generally against the idea of planting as many trees as possible.
Trees are not very good carbon sinks because they decompose and burn. Also, there are also some ecological communities where adding trees makes the land a worse carbon sink.
Avoiding cutting down forests to build suburbs is something I can certainly get behind though.