The XBB.1.5 subvariant — nicknamed ‘Kraken’ — is arguably the most genetically rich and most transmissible SARS-CoV-2 omicron subvariant yet.

But neither 1.5 C nor 2 C are “magic numbers,” as Katharine Hayhoe, a climate scientist at The Nature Conservancy, puts it. More carbon emissions in the atmosphere will result in more global ...

Climate science shows that beyond 1.5 degrees Celsius of warming, impacts in the U.S. get substantially worse. The world is on track for almost double that level of warming by the end of the century.