Sure, climate change is very real. Not a hoax at all. And having lived in Indonesia I have seen first hand the effects of plastic in the rivers & ocean.
However, these things you mentioned are all relatively easy to solve but the world has been designed in such a way that we use tons of plastic, we use tons of pesticides and many families eat meat three meals a day. This has been done by design by our rulers who now seek to take total control. If everyone had been encouraged over the last 100 years to grow their own food & rear their own animals in whatever way they chose we would not have these problems to such an extent today. But the centralised control system did not want the people to be independent. And so now we have this mess.