@georgia telling someone to "look it up" is not a good argument.
https://ourworldindata.org/mass-extinctionsevery one of these mass extinction events happened before humans were here so this is not an argument for man-made climate change triggering one of these events.
climate change is normal and caused by factors beyond our control like the solar system moving within the galactic plane, sun cycles, and so forth.
we're probably going into a new ice age soon- but by "soon" i'm talking geologic time scales not anything that we're going to trigger by the relatively small amount of CO2 we're releasing
i agree microplastics are way more of a concern than the weather. atmospheric pollution even (aside from CO2, which isn't a pollutant) is extremely concerning.