Biodegradable agricultural plastics are designed to break down naturally over time through the action of microorganisms, reducing environmental pollution. They are often made from materials like cornstarch or other plant-based polymers. Non-biodegradable plastics, on the other hand, are made from petroleum-based polymers like polyethylene and do not decompose easily. They persist in the environment, causing long-term pollution and harm to ecosystems. Biodegradable plastics are beneficial for soil health and reduce plastic waste, whereas non-biodegradable plastics contribute to landfill waste and can take hundreds of years to break down.