The Presidential Daily Brief


  1. Sydney Chokes on Smoke, Greenland Melting Faster

    As bushfires rage nearby, dangerously unhealthy air in Australia's biggest city climbed "off the chart" this week, experts said. On Tuesday, Sydney's air quality index rating spiked to 2,552 — 11 times what's considered hazardous. A healthy level is under 50. "We're living in a sea of smoke and particles," a local environmental science professor said.

    Is climate change a factor? Yes, experts say, offering more grim tidings: Greenland's ice sheet is melting much more quickly than expected — seven times faster than in 1992 — threatening to expose 400 million people to flooding by 2100.

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