Plastic alternatives

Humanity's dependency on plastic has created an Earth untouched by humans, from above the highest mountain peaks to the bottom of Mariana's Trench you will find plastic, remaining for up to a thousand or so years. Plastic-type materials shouldn't be found outside of human-occupied areas and should be completely biodegradable and compostable, leaving no harmful chemical or physical trace. I envision a world where plastic products are used sparingly and only if absolutely necessary (such as city infrastructure, construction, technologies, science, health care, etc.) and all single-use plastics are either not manufactured or replaced with biological materials. Besides all the laws and such that would have to be passed to essentially outlaw most plastic, new materials would have to be manufactured to replace single-use plastics. Having would be plastic products replaced with biological sources such as bamboo, banana leaves, mycelium, beeswax, seaweed, etc. would solve many issues that plastic has. It would allow these products to be edible or uninteresting to animals, they don't break down into micro-materials, and don't leach harmful chemicals into the air, water, and soils.