Scientist Urges Deep Cuts in Emissions

By MERAIAH FOLEY, Associated Press Writer
Fri Jan 6, 9:56 PM ET

SYDNEY, Australia - A leading Australian scientist believes the world has just 20 years to turn the tide on global warming and that leaders at a summit in Sydney next week must take concrete steps to tackle the problem.

Tim Flannery, a respected Australian scientist and author, says the world's economic powerhouses must take drastic measures over the next two decades before Earth's climate is irreversibly altered.