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Coal use in rural areas in the heating season is a major source of air pollution in the winter, said Sun.

Cohen was one of Trump’s fiercest defenders, working with him on business and personal deals. He once said he would “take a bullet” for Trump. But on Wednesday, he implicated Trump in alleged federal campaign finance violations.

Cohen also mentioned the Thucydides trap – "We're all looking at how do you manage a rising power coming into a competition and potentially conflict with the existing power."

Conference Board of Canada chief economist Craig Alexander said in an interview that since Canada is a nation that depends on exports of commodities, “a weaker Chinese economy would also hurt the Canadian economy by reducing sales and prices of raw materials”.

Comey described a private dinner in the Green Room of the White House on Jan 26, where Trump asked him whether he wanted to stay on as FBI director, telling him: "I need loyalty, I expect loyalty."