The world is facing a serious health problem with air pollution. This issue is hitting lower- and middle-income countries the hardest. These places often lack the tools to track air quality effectively. This gap in monitoring is a big problem. It means that many people are breathing in harmful pollutants without even knowing it. This is a crisis that needs urgent at...

Hematite, a common mineral, isn't perfect. It has defects that can be created by using a chemical called sodium borohydride. These defects are like tiny holes in the mineral's structure. Scientists have found these defects can be very helpful in trapping harmful arsenic. Arsenic is a nasty poison that can sneak into water and soil. It's a big problem in some parts of...