CNN News:美国批准"一小步法" 全球首个地外人类遗产保护法

What kind of weather would you most likely observe on the moon? Dust storms, lightening, windstorms or none. Scientists say the moon has no weather, so there's never a rainy day there.
So the boot prints that were first made there in 1969. The American flag that was planted. The three buggies that astronauts drove across the moon. It's all still there.
And the U.S. Congress passed a law late last year to legally protect American landing sites on the moon. A University of Mississippi law professor compared this to the same way more earthly laws have protected historic human sites like Machu Picchu. Well maybe on the exact same way. Critics say it would be tougher to monitor and enforce laws on sites that are 239,000 miles away especially when we don't currently have the technology to get a person there.

But back to the law, the idea behind the One Small Step Act is to require companies that work with NASA on moon missions to make sure they help preserve the landing sites of the Apollo missions. People are expected to return to the moon in the years ahead. Several countries are working on that. And though the One Small Step Act is unlimited, it concerns only U.S. moon landing site and applies only to companies working with NASA. It is the first law of its kind concerning our only natural satellite.