Carbon dioxide, global warming

What am I missing here?

So-called environmentalist "experts" tell us carbon dioxide is a major cause of global warming.

Green plants absorb a large portion of the carbon dioxide from the atmosphere in the summer. In the fall and winter, green plants go dormant and don't absorb carbon dioxide.

According to environmentalist logic, since there is more carbon dioxide in the winter, winters should be warmer than summers.

Astronomers note the ice caps on Mars are receding due to Martian warming. Space probes find warming on other planets and their moons.

Has any one considered that the Sun is the source of global and galactic warming?

Is it possible we are victims of a fantastic hoax? After all, Al Gore and others have huge financial interests in keeping the carbon dioxide scare going.

Donald Froelich

Mount Prospect