Uh-oh, I thought for a minute there Dr Han was in for a little talking-to from the Kyoto crowd, a little reminder that it's the Americans and their SUVs that alter the Earth's atmosphere. But I see he made a graceful recovery in that last line, the one about this stuff increasing due to global warming.
But in that connection I have to ask the obvious question: If we're just now seeing all this stuff, how can we possibly know it 'will increase because of global warming'?