A vomit<span> is </span>throwing up your<span> stomach contents outside from </span>your<span> mouth. </span>Vomit<span>consists of half digested food or liquid that is mixed with </span>your<span> digestive juice that exits through </span>your<span> mouth. It could be anything that you have eaten.</span>
Answer:
I think you have spelt it wrong, it is cementation
Explanation:
Definition of cementation
1 : a process of surrounding a solid with a powder and heating the whole so that the solid is changed by chemical combination with the powder. 2 : the act or process of cementing : the state of being cemented.
Lichens are widely used as environmental indicators or bio-indicators. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. Therefore the answer is the air quality is good because of no lichens present