It seems to me you are missing the point. This is an article about a new scientific discovery. It is not an article about how capitalist industries implement science.

To my understanding, trees are the best carbon sink among plants. Weeds can be extremely important for healthy ecosystems, but are not considered as “carbon sink” per se because they have small roots compared to trees and other plants. (Btw if you have a link to share that talks about weeds as important carbon sinks, I would be very interested to take a look at it. So, please share.)

This technique utilizes invasive weeds to make pellets, instead of cutting trees.

The problem is

The problem is capitalism with its embedded goal of growing profit. It took capitalists some time and a lot of propaganda to convince people to shift to single-use plastics instead of reusable containers (i.e. glass bottles for milk). It is not profitable for this economic wasteful system of production to change back, and it doesn’t need to, because this system is backed by governments all over the world. So, the solution can only come from a systemic change.

For capitalism: horizontal organizing

For plastic waste: plastic-eating fungi

For non-functional parts, there is also the option of making jewelry, lamp shades or art in general. This can be a great way to improve soldering skills as well!

I am a quite skeptical of this project, mainly because it is related to circular economy.

A relevant link (article+audio) would be:

How the ‘circular economy’ went from environmentalist dream to marketing buzzword