同学们，本栏目是对你们学过的知识和生活中常见问题的归纳。其中，有一些共性问题，也许你会需要哦！

让我来帮你解决常见问题！

Question1: What is the message given to us in the essay?

Answer:

The environmental degradation happened in the US. Human beings are tampering with nature and causing so many quick changes that they cannot adapt to them.

Question2: What do you learrn from the passage?

Answer:

We are facing a very serious ecological problem, and we must do everything possible to keep out water and air clean; to protect our land and soil; to preserve out forests, rivers and lakes, marshland, wilderness; to stop the global warming; and to save the endangered species, people now generally agree that we should not develop our economy at the expense of our ecosystem. We must aim at a sustainable growth. We should contribute to environmental protection from now.