My 0.02c. Not intending to start any debates, just stating my opinions.
Climate change; humans have been stripping forests, burning coal and oil & turning existing eco-systems into single crop farms. Of course we're having an effect.
Vaccines; Much better than the alternatives, even if *all* of the scare stories are accurate. Though I doubt large numbers of negative results would be hidden by all of the worlds varied medical systems. They don't all have the same blindness to Big Pharma's influence.
Age of the earth; Personally I think a global flood story fits the geology better than reliance on gradual processes. Perhaps triggered by a huge asteroid bombardment that hit the entire solar system (my fathers pet theory that he has been researching and may write a book on). Most of the geological record is made of very clean flat sedimentary layers with no signs of habitation or erosion. I believe the Fossil record was mostly sorted by water, sinking based on size or density not age or biological complexity. All those dinosaurs died out quite quickly after the climate changed or humans decided to hunt them. I have yet to see any evidence that compels me to believe that evolutionary processes can create new cellular machines. Yet animals change in various ways and adapt to external selection pressures quite rapidly. Most evidence of adaptation seems to be achieved though tweaking the parameters of existing features, or the destruction of existing cellular machinery.
TLDR; I'm not ignorant of the common scientific theories, the data they are based on and how they are derived or tested. I choose to believe that there is a better interpretation, based on data and ideas that are wilfully ignored.