I'll jump in and give my opinion.
I grew up at a time when the effects of pollution, unregulated pesticides, and the extinction of species were just beginning to be realized.
My political views were sandwitched between the lyrics of Tom Lehrer's Pollution song:
Pollution, pollution,
They got smog and sewage and mud.
Turn on your tap and get hot and cold running crud.
and a poignant add entitled "Run Rhino Run, Extinction is forever" (and add that for the White Rhino, may sadly be true).
Because of that, and many other public concerns such as lead paint and asbestos, and most recently the BP oil spill, I am strongly supportive of government regulation in public health, safety and the environment and why I do not trust industry to "self regulate".
Does it go to far? Sometimes. The problem with a centralized federal government is it most often operates in a one-size fits all mentality. It also inevitably aquires a burdonsome and unweildy amount of bureaucratic crap that defies common sense. Because of that, small farmers may find their small manure lagoons regulated the same as toxic waste sites.
But I would not want to go backwards.
I have long championed federal policies that championed regulation and clean up of shared waterways, aquifers, air, coastlines, and potentially hazardous products coming into the country or crossing state lines as the states cannot realistically regulate this themselves. Such I believe falls squarely in the intended realm of the general welfare.
But does it HAVE to extend to the small farmer's manure lagoon that is bothering nobody?
I think giving the federal government auithority to regulate almost every aspect of how a business conducts business just because the federal government considers it the right thing to do is way more authority than what the federal government was intended to have.
Would it be going backwards to leave matters that affect only the people within the borders of a state to that state to deal with?
No, not in my opinion.
Certain resources are national resources - to be conserved for all Americans. Wildlife, wildlands, beaches, for example. In addition - things which effect water and air don't stop at state borders.
One example is the reintroduction of wolves into parts of the US. Once they felt that the species had sufficient population, they took it off the endangered list turned management over to the state. State's response? Bowing to pressure from anti-wolf ranching lobbies, deer hunters etc they opened up hunting. I think it's back on the list now.
You are obviously not an owner of livestock or make a living raising said animals. I shoot any predator that kills my animals. Have you ever considered the terror experienced by a sheep or cow when they are attacked and killed by a predator or feral dog? Oft times, such predators will begin devouring their prey before it is dead, lots of them attack pregnant animals and drag the unborn young from their womb prior to eating it.
Here is one of those mandates that requires commerce and industry, farms/ranches and everybody else, to adapt their practices and property to accommodate endangered species as defined by the EPA. I really can appreciate the rules such as making it illegal to shoot bald eagles or whooping cranes for sport.
It is undeniable that reintroduction of the gray wolf into the wilds of Yellowstone has netted great benefits for all the wildlife, for the vegetation, and even for the waterways. Yellowstone needed that wolf to thrive in important ways.
Reintroduction of the Mexican wolf into the more populated areas of southern New Mexico has not been a happy experience. The human population was nicely regulating the deer and elk population and keeping it at a non destructive population level pleasing for aesthetic purposes and sufficient to supply meat for those who wanted or needed it and for sport. But the depleted deer and elk population didn't furnish easy prey for the wolves who were soon invading towns, raiding garbage cans, and going after chickens or pets or baby calves or lambs--anything they could kill with their limited skills.
And as GW said, those calves and lambs and chickens generally represented the livelihood of the people who were raising them. So they shot the wolves as they felt they had to, toss the tracking collars on the tops of semi trailers passing through. Whatever they felt they had to do for their own survival.
And elsewhere--and this still turns my stomach to think about it--the environmentalists were capturing and severely injuring deer and elk and turning them loose in hopes that the starving wolves would be able to catch and bring them down.
There is nobody on the planet probably who is more even militantly passionate about our wonderful planet and the wonderful plants and creatures on it and all its aesthetic beauty as I am. I get white hot with anger when people intentionally or carelessly harm that. But there are many ways to look at these thngs. And one-size-fits all federal mandates are certainly not the answer for all. Maybe for even most.