1.
The variety of all living species on the planet
2.
A community of organisms and their environment that depend on each other
3.
The process of reusing waste as raw material for new products
4.
Natural decomposition of organic waste into fertile fertilizer
5.
The ability to do work, often obtained from renewable sources
6.
Meeting the needs of the present without endangering future generations
7.
Organic matter used as an energy source, such as wood or plant waste
8.
A gas in the atmosphere that protects the Earth from harmful UV radiation
9.
The presence of harmful substances in the air, water, or soil
10.
Mass destruction of forests, often for agriculture
11.
A way of traveling with the aim of preserving nature and learning about sustainability
12.
Kind of energy obtained from the heat inside the earth
