I see in the paper that global warming is a crisis and that only good Democrats can save this world from rising seas and high temperatures and that President Trump is singlehandedly undoing all the great things Mr. Obama did to save humanity. Ha! It is true that the world has been warming now for some 10,000 years and that the growth of human population and use of resources has been rising at huge rates over the last 100 years. All the data says we now have too many people for the carrying capacity of the planet. We probably are adding to the many factors that are causing the world to warm. How much is directly caused by people and how much is caused by the natural trends of the cosmos is debatable. Some scientists say we are about due for a cold spell on this earth and that the glaciers could come back. If you think global warming is a problem for humanity then think about what a good ice age will do. The last time I did some reading on the subject the theory was that an ice age happens very quickly and the last time we had one, the ice was a mile thick in New York City. Water in the subway will look like a small problem then.