The United States moved to solidify a fragile calm in Gaza on Tuesday, as Vice President JD Vance voiced “great optimism” about a US-brokered ceasefire between Israel and Hamas. Speaking in Kiryat Gat ...

The US government will stop sharing air quality data gathered from its embassies and consulates, worrying local scientists and experts who say the effort was vital to monitor global air quality and ...

In February, the US Environmental Protection Agency lowered its fine particulate matter (PM 2.5) standard from 12 to 9 μg/m 3. The EPA said it would track which areas comply with the new standard ...