Mr Hu is a power engineer and Mr Zeng a rocket scientist.

ECONOMIST: Colour me grey

Mr Hu says that China will go further in the coming years, by trying to cut the carbon emissions per dollar of GDP produced, for example by developing renewable and nuclear energy.

ECONOMIST: Climate change and the UN

"Every person's experience is different, but most have less influence than before, " Mr. Hu said in an interview.

WSJ: Chinese Activist's Departure Brings New Questions

"Without those promises, he would be grabbed and taken away as soon as he left the embassy, " Mr. Hu said.

WSJ: Escape Poses New Riddle for U.S., China

" When Ms. Hu came onstage a second time, to collect Mr. Dimon's award, Mr. Velshi said, "Hashtag, six billion.

WSJ: For J.P. Morgan, Lemons to Lemonade