This International Day of Clean Air for blue skies ... Health impact: tiny, invisible particles of pollution penetrate deep into our lungs, bloodstream and bodies. These pollutants are responsible ...

It comes as Kyiv launched a new offensive into the Russian region over the weekend. Submit your questions for our correspondents in the box below.

ABC World News Tonight anchor David Muir stated, “We turn now to the alarming images tonight, the frightening moments on an ...