他还说，如果有可生物降解袋相助，人们会完成更多制肥工作。
People would do a lot more composting, he says, if they had biodegradable bags to help them.
这一条并不是说你需要去花钱在可生物降解或可循环材料上。
By this I don't mean you need to invest in biodegradable or recycled materials.
这种未来材料——可生物降解的塑料也许就来自于藻类衍生的油中。
A future source of such biodegradable plastics might even come from algae-derived oil.
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