If the arm has an open wound, once source could be the beginnings of Gangreen. There might be other reasaons, but this is the only one i think of.
Why are you eating dirt
lack of nitrogen
It isn't the Gluecose that make the leaves turn green , its the Chlorophyll.
It will oxidize, which causes it to turn green.
Veins as seen through tissue are normally sort of a greenish-blue color.
Many things: moss, animal and fish waste, and pollution.
Bleaching you hair because black dye has alot of blue in it. Yellow and blue makes green.
The presence of irradiated nitrogen trapped in the diamond's crystal lattice is responsible for giving diamonds a green color. The exposure to radiation causes the diamond to absorb light differently, resulting in the green coloration.
Because there is something in the nail glue, that causes a fung to grow. My nails do that too
Generally it is caused by mixing two incompatible types of antifreeze. Such as regular green propylene glycol with Dex-Cool. They are supposed to be mixable, but they turn into an orange-green mud in the cooling system.
A substance that turns universal indicator green is a base. Bases have pH levels higher than 7, which causes the universal indicator to turn green.
mucus causes green saliva>