Well nothing really “happens”, but more trends we see now will continue and intensify. Think drought, extreme weather including flooding, harsh growing conditions in general. Fires, deforestation, loss of animal life in general, warmer oceans and rising seas.

Uhh not sure what else, theres a lot of questions on how our society will be able to respond to the changes to our understanding of the entire global landscape. Wars may be fought over resources like water. Immigrants fleeing from places now too hot/inhospitable to realistically make a life. How will we respond to life as we know it changing drastically in real time all around us?