Do you think corporations are the root cause of the problem, or is it consumerism, capitalism, or all three?

We face a vicious circle where there is someone who needs or wants something and there is another who offers you to produce it. There are several forces who potentialized this circle: consumism and capitalism. The boom of both of them has accelerated the circle and thus, the problems derivated from it.
Corporation are an important element of that circle and, therefore, they have a tremendous guilt, but capitalism,and our new life style is in part in charge of creating those holes over environment, human health and so on.
Corporation are not the root cause of the problems, it's more the existence of capitalism that triggers all those damages.
At least we do not realise about what is going on around as and the potencial consequences that our life style could bring, Corporations will keep acting as they act because, as Michael more said: they do not know how much is enough!
After all Corporations are managed by people, they are the ones who have to be aware about when they can not go further, and when they are causing damages over society. But this is really hard to achieve, because when you put all this things against the bottom line of the Corporation, sometimes weighs more to make more money than do it right.