Local debate on global warming and climate change is likely to heighten this week, with leading international figures specialising on the issues arriving in Hong Kong. Former US vice-president Al Gore is expected to arrive tonight and is due to attend private and public functions tomorrow before leaving on Thursday. He will give media interviews and meet green groups tomorrow evening before attending the gala premiere screening of his documentary, An Inconvenient Truth, at the Convention and Exhibition Centre. The 98-minute film features scientific information, including historical data, photographs and video clips backing global warming claims. Mr Gore will also meet Sarah Liao Sau-tung, Secretary for the Environment, Transport and Works, during the screening but might not be able to share his message directly with Chief Executive Donald Tsang Yam-kuen. A spokeswoman for Mr Tsang's office said the chief executive would be attending the Shaw Prize dinner tomorrow. Mr Gore will also speak at a luncheon at the CLSA's Investors Forum, whose theme this year is climate, energy and environmental issues. Chicago Climate Exchange chief executive officer Richard Sandor and writer-scientist Tim Flannery will speak at the forum on Friday.