I applaud your company for its' efforts. Now if we can get the other 99% on board.The auto industry and coal industry, at least in the US, have become far more clean than they were at their inception.
These industries have only become as clean as regulations force them to be. The auto industry for example will increase mileage up to the mandate but not beyond. There are California emission standards that are much tighter than other states. The manufacturers apply the emission equipment to reach these standards only on vehicles sold in California. With the trend in deregulating and unlimited dollars being donated to political campaigns this type of behavior will only get worse.
In today's time, they would more likely seek to distort the evidence as you suggest. However I do believe that the current level of awareness in developed societies and nations is high enough that public outcry would be detrimental to a corporation's ability to profit if they knowingly abuse the environment with no attempt whatsoever to be clean. People who care, which should be all of us, would likely do what they can to not purchase from the abusing entity, IMO.
That is a good theory but consumers don't have a choice which oil or coal company they buy their product from. They don't even know where it comes from in nearly all cases. Without regulation forcing disclosure of or limiting of pollution the average consumer has no idea what these companies are doing.
I believe that if you search, you may find evidence of such behavior. Personally, I work for an organization that consumes a great deal of fossil fuel. In an effort to mitigate our impact to the environment, we use all commercially reasonable efforts to keep ourselves clean at the expense of profits. We pay more for fuel and use B20 bio-diesel in all of our equipment. Most of our company fleet cars are either hybrids or cars that exceed 25MPG. Is it in the news? Is it publicized for all to hear? No, but we are not a multi-billion dollar per year corporation and therefore out of the public eye. So, in this case a for profit corporation has, and will continue to police itself to be as gentle to the environment as possible.