Environment

Climate scientists say the conditions that might produce more or stronger tornadoes are spreading along with a warmer atmosphere. But there's no sign so far that this is happening. New research finds that when tornadoes occur in clusters, as they often do, those clusters contain more tornadoes than ever. And we're also seeing more clusters with especially powerful tornadoes.

President-elect Donald Trump has vowed to rescind some environmental regulations. Environmentalists are planning ways to keep a new administration from rolling back eco-rules.

Oklahoma and Texas have been experiencing a rash of human-caused earthquakes. It happens when oil and gas wastewater gets pumped underground in the wrong places and disrupts faults. Oklahoma officials have cracked down on wastewater injection; Texas is apparently uninterested in doing much. That could mean a lot more quakes given that the country's biggest oil reservoir has just been discovered in west Texas.