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This final lesson covers the AQA GCSE Combined Science Trilogy (8464) topic on using the Earth's resources sustainably. You need to understand natural and synthetic resources, potable water, waste water treatment, and life cycle assessments. These topics link chemistry to real-world environmental issues.
Humans use the Earth's resources to provide:
Resources can be classified as:
| Type | Description | Examples |
|---|---|---|
| Natural | Obtained from the Earth or living organisms | Wood, cotton, rubber, metal ores, crude oil |
| Synthetic | Made by humans through chemical processes | Plastics, nylon, polyester, medicines |
| Type | Description | Examples |
|---|---|---|
| Finite (non-renewable) | Being used up faster than they form; will eventually run out | Fossil fuels, metal ores |
| Renewable | Can be replaced at the same rate as they are used | Timber (managed forests), biofuels, cotton |
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