Ionic liquids (ILs) are a class of molten salts with a collection of exciting properties, which have been employed for ...

Fine particle levels are expected to reach the red air quality index category, a level considered unhealthy for everyone, across northwest and north central Minnesota.

Thousands of people in southern California were advised to remain indoors as "emergency" air quality conditions hit parts of the Coachella Valley.

Or it might be the first hint of a fifth force. If it is a fifth force, it is very weak. It is also mediated by a boson particle that could be lighter than a neutrino or much heavier than a top quark.

The Minnesota Pollution Control Agency (MPCA) issued the alert for central and southern Minnesota, which will run until 11 p.m. on Thursday.

Smoke has reached as far as Europe. MPCA says that fine particle levels are expected to reach the orange air quality index category, "a level considered unhealthy for sensitive groups." ...

The Minnesota Pollution Control Agency has issued another air quality alert for all of Minnesota that runs until noon on Wednesday, June 4.

But fine particle levels are expected to reach the red air quality index in northern Minnesota, a level that is unsafe for everyone, according to the Minnesota Pollution Control Agency.