As others have previously said, you can come across as intelligent, knowledgeable and educated in many of the areas you discuss, as such it's hard to know if you really hold these views or are just taking an opposing position with those whose ideologies you disagree with.
I'm sure we can all recognise that in many ways things have improved pollution wise and in terms of ecosystem damage. However those minor changes to reduce impact can't necessarily make up for the accumulation of damage over the last decades or centuries. The sheer amount of damage to our ecosystems is enormous, in terms of (to name a few) soil loss, pollutant build up, nitrate levels, total loss of habitat, loss of species diversity, reduced water holding capacity, species loss and food chain impacts, etc etc.
Some of these are due to agricultural practices, others due to development, others to climate change and they are all more than just a local issue. It is a problem locally, nationally and internationally, but the UK is widely recognised as one of the most Nature depleted countries due to the sheer amount of time that we have been developed and industrialised and the long term impact of these practices. (which for those of us lucky enough to spend much of our lives in rural and relatively unspoilt areas may find hard to believe).
Do you really deny these things and feel that those who publicise them and publish research are falling for a big lie with a political background?