A vast amount of nitric acid leaked from a chemical plant and turned the sky orange in central China.<br /><br />The video, captured in Sanmenxia City in Henan Province on April 11, shows orange smoke hovering above an industrial area.<br /><br />Water was sprayed into the air in an attempt to prevent the smoke to spread, reports said.<br /><br />No one was injured and the reason is being investigated.
