Ecological crisis is when too many bad things are being done to the environment around us, like cutting down too many trees, pouring too many chemicals into rivers, and not taking care of the air. This can make it harder for plants and animals - and even people - to survive. It can also mean that natural places, like forests and lakes and oceans, don't look the way they are supposed to. We have to take care of our environment if we want to keep it healthy and beautiful!