US-Israel strikes on Iran's oil facilities have caused black rain. The WHO raises concerns that it could pose serious health risks.

Tijuana has long attracted people seeking medicine and medical procedures unavailable or unaffordable in their home countries ...

Discarded cigarette butts are polluting waterways with a significant amount of microplastics, according to a new study in the Journal of Hazardous Materials: Plastics. A team of scientists from the ...

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