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US climate change negotiators express optimism

Washington

AFTER more than two decades of trying but failing to forge a global pact to halt climate change, UN negotiators gathering in South America this week are expressing a new optimism that they may finally achieve the elusive deal.

Even with a deal to stop the current rate of greenhouse gas emissions, scientists warn, the world will become increasingly unpleasant. Without a deal, they say, the world could eventually become uninhabitable for humans.

For the next two weeks, thousands of diplomats from around the globe will gather in the desert metropolis of Lima, Peru, for a UN summit meeting to draft an agreement intended to stop the global rise of planet-warming greenhouse gas.

The meeting...

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