> overharvesting
If I own the land, and I mean own and am responsible for - no taxpayer subsidized safety net if I go too badshit crazy with the nutrient depletion or chemical baths - then it is in my best interests not to ruin the property so that it remains valuable if and or when I want to sell it.
Either I intend to sell the land, thus making it worthwhile not to destroy it, or I intend to continue using the land for an extended period of time, and I wouldn't want to destroy it. I only really don't care if I have guaranteed payouts no matter what I do, and no responsibility or reason to care to take care of the land anyway.
> pollution
In the modern anarchist mindset, pollution is a violence against, depending on scope, either the local community that is negatively impacted by the polluter or the entire world in how that pollution negatively contributes to the environment.
In either case, any sane libertarian or anarchist joint arbiter would in the commons consider major polluters as causing property damage, and thus any company that wants to pollute would need to seek permission from the entire area around where they want to set up shop. And when remote injunctions start coming in about how their pollution is damaging the planet as a whole, the reparations would need to be either removing an equal amount of pollution that they put in or contributing in some way to projects that do, else they are being violent upon pretty much everyone in a way that any sane society would see they only operate when everyone is consenting.
> only states can stop it
More like only states can enable it - because in modern states you never own your land, and never consent to your neighbors, and never have contracts with them about mutual conduct agreements and recourse for violation you depend on the state to provide some fictitious encompassing control effect on those that perform the kinds of violence I outlined earlier. Except the state is itself inherently violent and amoral, and is easily corrupted because of the centralization, so it is much easier for the coal company to bribe the local town council than the entire town.
> so are markets and companies
And all your interactions with markets and companies are voluntary. If they are not, you aren't really operating in a free market. If they are not inflicting violence upon you or others, you really have nothing to complain about, really. And if they are, it is your duty and the duty of your peers to cease dealings with the violent aggressor and either economically deprive them of resources until they recant or defend yourselves appropriately as a last resort.
> corruption in states than there is in markets
The problem is that corruption is inefficient. In the absence of states, nothing restricts you from directly competing with anyone over anything, so if they are acting in a corrupt way, then there would be avenues for capitalization by competitors to exploit it. It is the same reason why in the short term it makes no fiscal sense for a business to try to raise a private militia to take over the town - the militia is an immediate huge competitive disadvantage, and you would cripple your growth potential to whoever you could subjugate because no sane external market would interact with you, and would likely do anything they can to boycott you into failure.
> What the market wants
Modern mainstream media is anything but a competitive market. The major networks would always take advantage of their IP and state resources to crush any upstarts who tried to provide real journalism and news anymore. And they would certainly get the full support of the US government in doing so.
In a real information market, people would seek what they are actually interested in. A lot of anarchist arguments about the collective psyche of most modern western democracies relates the whole distraction circus back to the implicit discontinuity in the brain about the organization of society in the first place and the amorality of it all. It also probably has a lot to do with how most people were abused as children - your brain will develop differently and you will always seek escapism. Confronting the reality of your circumstance is hard, and it requires enlightened rational individuals to do so. That is mainly why, while I morally agree completely with anarchist mindsets, I don't really advocate it in the modern world. It really wouldn't work with the current crop of humanity - it would require enough transitional generations to get to the point where we stop predominantly abusing our children, either through neglect or violence.