Mysterious black smoke ring floats through the sky in China

Mysterious smoke circle in sky baffles people in Chinese city

Passengers injured during emergency escape from smoke-filled plane

Mexico's most active volcano spews ash and smoke triggering flight cancellations

Mayon Volcano spews white smoke during phreatic eruption in the Philippines

Towering smoke plume seen over Taal Volcano in the Philippines

Rocket explodes in spectacular fail showering locals in smoke and sparks

Philippines volcano eruption causes towering smoke plume over homes

Philippines volcano eruption creates towering smoke plume over homes

Anarchists hurl smoke bombs during clashes with police in Thailand

Bizarre black ring of smoke appears in sky after ship burns and sinks