Modern humanity has a critical task before it.
Our impact on the environment is disrupting nearly every ecosystem on the planet at a rapidly accelerating rate. Glaciers brought major reshaping and change. Our activities caused even more drastic changes in a fraction of the time. The thinning of the ozone layer will allow more of the sun's ultraviolet radiation to reach the earth, causing more skin cancers, impairing human immune systems and retarding crop growth. Gases already present in the atmosphere will cause continuing deterioration of the ozone layer for years to come.