Final answer:
Plastic waste takes up the largest portion of landfills due to its non-biodegradable nature.
Step-by-step explanation:
The largest portion of our landfills is generally occupied by plastic waste.
Plastic manufacturing has been increasing, and a significant amount of plastic is disposed of after single use. According to statistics, approximately 40% of plastic is used once and then thrown away.
Plastics do not biodegrade, which means they do not break down naturally over time. This makes them a major contributor to landfill waste.