This document discusses ecosystems and the impact of waste. It begins by defining environment and explaining how human activities produce biodegradable and non-biodegradable waste. It then defines ecosystems as areas containing living and non-living components that interact, including natural ecosystems like forests and artificial ones like gardens. Ecosystems have biotic components of producers, consumers, and decomposers, as well as abiotic components of air, water, and soil. The document concludes by asking questions about why some substances are biodegradable or non-biodegradable and their different impacts on the environment.