Let us take your opening statement as valid. The complexity of the problem requires solutions that allow non experts to make an impact. If manufactured goods need to be engineered, the needed investment requires group interest, a market and research and development. Reducing investment costs could accelerate this through an avenue similar to open source software. There are probably other avenues.

Re-engineer manufactured goods, make transport more renewable, reduce food miles and agriculture emissions, most consumers are supportive and simply need a simple way that they can help drive and make the change.