COP17: The world wants to save nature, but is it on track?

①COP17: The world wants to save nature, but is it on track? (00:43)

②US, Japan agree to cooperate on the so-called "first island chain." How will it threat Asia-Pacific security? (14:15)

③How China builds a greener, smarter marine economy (25:18)

④UN again calls on US to end Cuba embargo. Why is Washington so obsessed with keeping it? (34:53)

⑤Exploring the power of high-performance computing in AI development (43:14)