Huge firework displays will mark 4 July in the US, but the nation's air quality will suffer
Millions of fireworks are set off each year to mark Independence Day in the US, causing air pollution to spike. Should you be worried?| www.bbc.com
Millions of fireworks are set off each year to mark Independence Day in the US, causing air pollution to spike. Should you be worried?| www.bbc.com
Four years after the WHO declared the COVID-19 outbreak to be a pandemic, researchers say much is still not understood about a common complication: long COVID.| ABC News
