Tongans warned of acid rain after volcanic eruption

A toxic cloud spewing from an erupting volcano in Tonga could dump acid rainfall across the Pacific kingdom, potentially poisoning drinking water and damaging people's skin and eyes, emergency services have warned.

How to monitor urine in pools—by testing sweetness

Even though Olympic swimmers have admitted doing it, peeing in the pool is not a condoned practice. Urine contributes to the formation of compounds in pool water that can be harmful to people's health. Now scientists are ...

California unveils strictest rules on pesticide

California farmers now must abide by the nation's strictest rules for a widely used pesticide in a change designed to protect farmworkers and people who live and work near agricultural fields but is likely to raise prices ...

Toxic mud spill kills four in Hungary

Hungary declared a state of emergency on Tuesday after a toxic mud spill killed four people and injured 120 in what officials described as Hungary's worst-ever chemical accident.

Harmful 'red tide' hits Dubai beaches

Beaches in the Gulf tourism hub of Dubai have been plagued by a bloom of algae known as the "red tide" that has killed fish and is potentially harmful to humans, a municipality official said on Tuesday.