Its all about money! Whatever the latest environmental fad is draws in money. It just happens to be global warming. In the 70's it was global COOLING (yes, cooling), 80's it was acid rain, 90's it was the ozone layer, and now its global warming. Money for politicians like Al Gore to not actually have to really work, but make big money on movies full of mistruths, and all sorts of non related organizations to make money on their own cause. All they have to do is mention global warming is the cause of their problem, and the government will give them money to keep paying themselves to do whatever they are doing.
The whole glaciers are melting idea comes from a half a dozen 'conviently' selected glaciers that are regularly measured. Add in the other 20 or so large glaciers across this world, and you actually find that overall they are growing, not shrinking. The climate changes over time as does everything. Eventually the sun will burn out and turn into a huge super nova and literally swallow the earth. That'll happen in another ~5 billion years. Not firing up my lawn mower this weekend certainly won't prevent that.
After all, the same scientists who believe in the ice age, came up with global warming. I find it hard to believe that the fire the caveman built to cook his dinosaur was really the cause of the ice age ending.
If you want an environmental cause, find something else like China. There are real problems there people can actually do something about. Humans have a huge impact on the environment for sure, but if you take the billions upon billions of dollars out of the global warming fad, you'll not hear a peep about it anymore. When was the last time you heard something about acid rain? Yeah its been a long time for me too