To the Editor: Last week I joined with a group of neighbors to watch Al Gore’s “An Inconvenient Truth.” Any reasonable person exposed to the facts in this film has to rate global warming the number one threat to the security of America and the world. Comparative pictures, years apart, show that formerly snow covered mountains like Kilimanjaro are now bare, that glaciers have all but disappeared in Glacier National Park and that Greenland’s snow cover is disappearing. The trends are striking. Rising world wide temperatures parallel growing atmospheric greenhouse gas concentrations which, in turn, track increasing carbon dioxide emissions from human activities. If the situation continues, our children and grandchildren will be in trouble. It bodes ill for the health of the atmosphere that the Bush Administration set its energy policy in secret, under the aegis of Vice President Richard Cheney, in closed meetings with executives whose interest was to increase the exploitation of fossil fuels. Cheney excluded input from environmental groups or proponents of alternate energy sources or effective energy conservation. As a result, the Federal Government is doing virtually nothing about global warming. Democrats got elected in part because they promised to end that corruption. Let’s see them perform. Michael G. Busche