Recycling. processing and treating discarded materials so that they can be used again.
Reduce. to decrease the amount of materials and resources that you use. For example, using less paper when writing or drawing (using both sides of the paper).
Reuse. To use a material after the end of its initial use. For example, using an old shoe box to store items.
Ecology. The science that studies the ways in which organisms and their environments are interrelated.
Pollutant. Any substance that can make air, land, or water dirty or impure.
Litter. Any unneeded item that has been carelessly discarded instead of being disposed of properly.
Landfill. An enormous hole where garbage is dumped.
Composting. The process of turning organic wastes into a nutrient-rich mixture that can be used to condition soil and feed plants.