Starter Lumberyard should be named "Burner Lumberyard" and electric lumberyard just "Lumberyard"

Burner Lumberyard should be unlocked from the start

Burner Lumberyard should produce a small amount of pollution (like 1-5/m)

All Lumberyards should display the radius that they affect

The mod needs a larger resolution icon for the tech nodes and mod thumbnail,
even if it's just an up-scaled version of the small one that would work

Likely not going to change. I suppose there is some logic to "Burner Lumberyard' since burners are usually named as such, so I could alter the locale file to reflect that. Just doesn't seem all that important.

I actually wanted it to unlock via trigger on mining trees but couldn't get it to work. I think because there's not just "Tree" but a whole bunch of different trees. The current research is quite cheap and I don't want to drop it, but I could add an option to unlock it at start.

I didn't look at pollution values at all. Or energy consumption, not that you mentioned it. Worth investigating at least.

100% agreed here. Not sure how to do this, but I admittedly haven't tried very hard.

Why? Genuine question here. Is it causing some issue that I didn't notice? Or does it just look bad? I'm so incredibly insensitive to graphical things (resolution or framerate) that I would never notice.
Anyway, I can probably figure out how to upscale them with imagemagick or something, but I can't promise it will look any different.