A comprehensive resource for safe and responsible laser use
Dr. Philip Davies does not think he will substantially cause a greenhouse effect on Mars. His effort is primarily to point out shortcomings in the wording of the treaty, that in turn could lead to revisions. Davies' goal is to prevent militarization of Mars or other off-Earth bodies.
To help publicize his effort, he is claiming he owns Mars and is selling plots of Martian land, with a few acres going for one U.S. cent.
The laser pointer can be seen on the left side of Dr. Davies' telescope. At right is the beam it projects into the sky. From the look of the laser, it's output power is probably in the low Class 4 range, around 500 to 1000 milliwatts (1/2 to 1 watt).