You don't solve systemic problems with individual solutions.
It not only doesn't work, but is actively counterproductive - while people are busy policing others' use of plastic or water or individual brands or whatever, and then patting themselves on the back for "saving the planet" by taking actions that have the impact of a drop in a thousand oceans, the corporations and the people behind them continue to rip us all off and destroy the planet in ways that we could absolutely never impact with individual choices.
Stop suggesting hemp, start suggesting abolishing capitalism. Anything else is enabling the status quo.