It's going to be climate collapse and resource depletion over the next 25 to 30 years. Click the spoiler for some of the ways this will happen. There are other factors at play too but imo these are the main ones.
spoiler
90% of earths topsoil is at risk of depletion by 2050
Global freshwater demand will exceed supply 40% by 2030
Global human population has surpassed Earth’s sustainable carrying capacity.
Global carbon emissions are still rising
The arctic sea ice extent is declining rapidly and we're likely headed into a Blue Ocean Event later this year, and potentially a double BOE depending on how the El Nino and summer in the southern hemisphere go.
The world is likely to exceed a key global warming target soon but the earths alebedo with the declining sea ice and lack of cloud cover will impact these numbers massively and isn't being predicted for, which means that 4.5c above the baseline by 2060 is now possible.
I know I keep fucking posting this in comments around the fediverse but it needs to be seen by as many people as possible because this is fucking happening and most people still have no idea and think everything will be ok.