Well, CO2 in the atmosphere (and amount of carbon above ground in general, a lot has been brought up from below in the last 100 years) and plastic pollution come to mind. Ocean pollution. Bio-diversity. Less or no weapons of mass destructions. No climate change yet, e.g. in the western US water from rivers was less of an issue and could be distributed more freely.
There were a lot of extremely dirty industrial processes which we are doing much better now (in the developed countries at least), superfund sites in the US and their equivalent in other industrialized nations as the known locations, but it did not reach the global scale yet, plus, what they buried or just left in the ground where the factories spilled it is still there now for the most part.
I think that in quite a few ways we've gotten better, sure, but partly by kicking the can down the road instead of actually solving issues such as sustainable energy or water use instead of drawing from and heavily relying on exhaustible stores, as well as not having closed loops with the things we produce.
There were a lot of extremely dirty industrial processes which we are doing much better now (in the developed countries at least), superfund sites in the US and their equivalent in other industrialized nations as the known locations, but it did not reach the global scale yet, plus, what they buried or just left in the ground where the factories spilled it is still there now for the most part.
I think that in quite a few ways we've gotten better, sure, but partly by kicking the can down the road instead of actually solving issues such as sustainable energy or water use instead of drawing from and heavily relying on exhaustible stores, as well as not having closed loops with the things we produce.