Possibly a fungus. It may come off if you clean them under cold water with a green plastic scrubbie. -Also, when you bring green beans home from the store, re-pack them in brown paper bags , DO NOT leave them sealed in a polyethylene bag.
No it means it's spoiled
How you cook the beans won't matter. If there are only a few brown spots, you may not notice any taste problems at all. If there are alot, the beans may taste bitter. This will be true however they are cooked.
No, they could contain bacteria that would make you sick.
yes
Brown spots on beans are commonly caused by bacteria . Lots of fungus plants live with and on our veggies in every garden.If we eat its affect our health. We should try to avoid eating green beans with the brown spot.This kind of fungus bean causes diseases for the human.
anaconda
if it has green or brown spots on it
Fruit will discolor as the fruit becomes no longer fresh. The brown spots on raspberries are more than likely a result of the fruit no longer being fresh. There is no danger the fruit will cause if eaten.
red maple leaves
An Anaconda is the largest snake in the world which is green with brown/black spots.
Basil with dark spots on it is aging and not fresh.
pale or grayish blue with spots of purple gray or blue