For example, lead paint in old houses can be a greater threat to children's health than lead that may be under some industrial site where there are no children.
Explore more quotes
Some people think that our planet is suffering from a fever. Now scientists are telling us that Mars is experiencing its own planetary warming: Martian warming. This has led some people, not necessarily scientists, to wonder if Mars and Jupiter, non signatories to the Kyoto Treaty, are actually inhabited by alien SUV-driving industrialists.