Advanced Topics
In a nutshell: Humans change Earth's systems, but we can take action to protect our planet.
## How People Change the Planet
Humans affect Earth's systems in many ways. Activities like deforestation, pollution, and burning fossil fuels change the land, air, and water.
### Major Human Impacts
- **Climate Change**: Burning fossil fuels releases greenhouse gases, warming the planet.
- **Pollution**: Trash, chemicals, and plastics harm ecosystems.
- **Resource Use**: Mining and farming change landscapes and water use.
## Solutions and Actions
Scientists and communities work to reduce these impacts by recycling, conserving energy, and protecting nature.
Examples
- Reducing air pollution by using cleaner energy sources.
- Restoring forests to help absorb carbon dioxide.
Key terms
- Greenhouse Gas
- A gas that traps heat in Earth's atmosphere.
- Deforestation
- Cutting down large areas of trees.
- Sustainability
- Using resources in ways that protect the environment for the future.