DEAD SCARY Terrifying algae named ‘Very Fast Death’ has started leaking toxic gas into the air that could kill or paralyse humans Charlotte Edwards, Digital Technology and Science Reporter Apr 7 2021, 12:45 ET A DEADLY toxin created by algae has been found leaking into the air for the first time ever, according to a new study. If breathed in by humans and some animals, it could cause paralysis and even death. 2 Blue green algae can be dangerousCredit: Alamy Climate change and farming practices are thought to be changing a natural blue-green algae process resulting in a toxin called Very Fast Death Factor appearing in the air.