#wanttoknow! – This week's viewer question comes from Harfiz Abu Bakury in Ghana.
Commuters in Germany now have a chance to ride the world's first hydrogen train as the country moves to replace old diesel-powered engines. Instead of exhaust fumes, hydrogen trains produce only water.
The United States Geological Survey has issued a "red alert" for the Big Island of Hawaii which means a volcanic eruption is imminent. The alert also warns airlines of potential ash along air routes.
Two more earthquakes have forced fresh bursts of lava and ash from the Kilauea volcano on Hawaii's Big Island. Thousands of people have been ordered to leave the area due to the ongoing seismic activity.
Thousands living in the shadow of a rumbling volcano on Indonesia's resort island of Bali fled Wednesday as fears grow that it could erupt for the first time in more than 50 years.
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