<!-- WARNING: #foreach: $wnstory.ATTS: null at /bb/data/web/templates/webmacro_en/20602099.wm:306.19 -->Preston Chiaro, the chief executive officer of Rio Tinto Group's energy unit, said coal prices aren't sustainable after rising to records amid Chinese shortages.

Power-plant coal from Richards Bay in South Africa and Newcastle in Australia rose to peaks of $111.30 and $116.44 a metric ton respectively last week, according to globalCOAL data. Snowstorms in China and floods in Australia reduced output.

"I don't think that some of the prices are that sustainable,'' Chiaro said in an interview in Cape Town today. "A lot of that is being caused by short-term issues. ... Read full article