A word frequently overlooked in climate change estimates is ‘conservative’. Scientists don’t want to be seen as alarmists, so they publish the conservative numbers, the ones they are most sure of. The nominal numbers are less appealing. A recent analysis changed the previous estimates. Ice is melting ten times faster than expected, so the oceans are rising faster than expected. Instead of twenty feet in two centuries, the more likely scenario is 10 feet in 50 years. Long term mitigation plans just became short term responses.
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