Preferably in the 1,500 to 5,000-word range.
Besides the obvious catastrophic climate change, how about overpopulation? Wildlife extinction? Deforestation? Air and water pollution?
How about failure to implement worldwide universal basic income in the face of increasing wealth inequality and job automation?
Pick your poison and put pen to paper. Better yet, if you want a chance to win $1,000, read this, then send your story digitally here!