Who is the government? Isn't the government, the collective of all the people, (unless it is some corporate body like a military dictatorship)?

Some argue that ownership by everyone is ownership by no one, but I argue that ownership by no one is ownership by all of society, society's agent is government.

And I hear and read self described conservatives and libertarians condemning all government regulation as infringements on their liberty and property rights.

But let's be clear, air, water, etc. are all absolutely necessary for any economic activity to occur, so those are absolutely critical inputs into any production. If they are taken away from you, your will fail to produce anything.

So, if capitalism means that private parties own the means of production, who owns the air and water?