I’m not familiar with how exactly one turns plant stems into biodegradable plastic, but the concepts of recycling glass and metal are pretty easy to understand where you just melt them down for in theory infinite recycling (minus the oxides for metals I guess). But does hemp plastic still win in terms of energy required to produce, compared to recycling glass or metal (which themselves require less energy than making new glass or metal)? Do we know enough about hemp plastics to determine this?