Someone downvoted this, but this is a real and legitimate thing. It is happening continually with conservation; people don't notice the decline in animals and d

Someone downvoted this, but this is a real and legitimate thing. It is happening continually with conservation; people don't notice the decline in animals and decrease in plant diversity because it happens over generations. In fact we even have a name for this; "shifting baselines". This is why measurement is so important, we wouldn't know about climate change without it. 0. https://en.wikipedia.org/wiki/Shifting_baseline https://en.wikipedia.org/wiki/Shifting_baseline