Not everything needs replacing, a significant amount would be fine just by not using. Produce does not need plastic introduced and would be a significant change. Cold drinks in coffee shops do not need plastic cups. Toys don't need to be packaged in plastic and so on.

We have some alternatives that work, and some scenarios where we still need to use it, but we can reduce the use significantly. Like Oil and Gas we absolutely do know better in many scenarios and just choose not to.