It seems that anthropogenic interference with the atmosphere has undermined two important things :-
(a) The ability of phytoplankton to reproduce because of the heat and the acidity of the oceans – thereby compromising the base of the entire global food chain and, more seriously,
(b) By reducing the conditions for phytoplankton success, cutting off one of the “Carbon sinks” on the planet that we really need to soak up a proportion of the excess Carbon Dioxide that we are pumping into the air.
Currently, the world’s biomass processes somewhere between 40% and 50% of all humankind’s excess Carbon Dioxide emissions, the CO2 we have made by taking Fossil Fuels out of the ground and burning them.
If this Carbon sink becomes less effective, Global Warming will become much stronger, as there will be a faster build-up of Carbon Dioxide in the Atmosphere.