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 it means it's spoiled
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, 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
An Anaconda is the largest snake in the world which is green with brown/black spots.
red maple leaves
pale or grayish blue with spots of purple gray or blue
An Arrowhead spider is brown with a green back. This spider is also known as a Triangle Orb Weaver. This spider is not venomous.
The background color behind the black spots ranges from a bright grass green, to a dull tan or brown depending on species.