[lvs]

Except the current use of the byproduct is not just flaring it off pointlessly as waste. The byproduct is being burned as a fuel, which in that usage is already (nearly) neutral. If an alternative fuel has to be used instead, that fuel is more than likely going to be natural gas or coal.

[testrun]

This is how we lose the war against global warming. The process here is simple: 1. Tree captures carbon 2. Carbon gets buried in a road.

Simple.

For warming we can use electricity generated by wind, solar, tides etc.

Do not move the goalposts.

[ghostbust555]

3. Carbon in lignon road is released as it decays over time.

[dymk]

Do you have a source that the binder is currently being used as a fuel source? I'm missing where that's implied by the OP.

[hansarne]

It's correct that lignin is used as a fuel, here's one source of it. ~98 is burnt. "currently most of the lignin produced from paper industry is burned as low-value fuel to generate electricity and heat (Luo and Abu-Omar, 2017) and only less than 2% is used for producing specialty chemicals ..." https://www.sciencedirect.com/science/article/abs/pii/S09266...

[civilized]

I wonder what makes it a low value fuel. If it has a lot of carbon per energy released, it may be better to bury it than burn it.