What is the difference between natural and synthetic raffia for agriculture?

“Synthetic raffia (polypropylene, PP) is stronger, lighter, waterproof and more durable, ideal for balers and for prolonged outdoor storage when UV-treated. Natural raffia (sisal) is biodegradable and does not contaminate forage — the preferred choice on livestock farms, where twine can end up mixed into the animal feed. Jute is biodegradable and economical for temporary ties.”