Natural resources

4. The variety of plants, animals, and ecosystems that keep nature balanced.
5. Energy sources made from ancient plants and animals buried for millions of years, like coal, oil, and gas.
6. Cutting down forests, often for farming or building, which harms animals and the environment.
7. Resources that can grow back or be replaced, like sunlight, wind, and forests.
8. Resources that exist in limited amounts and can’t be replaced quickly, like coal, oil, and gas.

1. Harmful things added to air, water, or land that damage nature.
2. Things from nature that people use, like water, minerals, trees, and land.
3. When an effect spreads to something else, like diseases spreading from animals to people.