From The passage, what is environmental? provide, at tes least, two examples.

Here are the answers to your questions:

1) Environmental degradation is any undesirable change or disturbance to the environment, often caused by human activities, that diminishes its capacity to support life.
Examples include:

1. Desertification
2. Deforestation

2) Here are sentences using the words:

• Contaminate: Industrial waste can contaminate rivers and harm aquatic life.
• Unleaded: Modern cars typically require unleaded gasoline to prevent damage to their catalytic converters.