Sadly this is the truth. Most people do not really care beyond their immediate self-interest, they will give up principles or jeopardise the future or other peo

Sadly this is the truth. Most people do not really care beyond their immediate self-interest, they will give up principles or jeopardise the future or other people for very very minor conveniences. You need to give people a reason to care by appealing to their self-interest. The only way I can see this regarding this problem is a tax on single-use plastics to make them very expensive.