Greenhouse gases are the cause of Greenhouse effect.The greenhouse gases which include CO2, Methane etc. trap the heat in the Earth's atmosphere and don't allow it to escape.
The weapon is fitted with a Leupold Mark 4. The rifle is also similar in appearance to the TAC-338 rifle that Kyle used in real life. McMillan TAC-338A sniper rifle with Harris bipod, Leupold Mark 4 scope, and AN/PVS-22 Universal Night Sight - .338 Lapua Magnum. Kyle taking aim with the rifle. Right side of the rifle.
Vortex Strike Eagle 1-6Ã24 AR Scope Review. Vortex first launched the Strike Eagle 1-6 x 24mm riflescope in mid-2015. The scope itself is marketed by Vortex as being dual use: Shooting Tactical/ Hunting. The Vortex Strike Eagle was designed primarily for 3-gun competition use. However, this scope can be effective in any application where speed to target is more important than long range tack-driving precision, including hunting and self-defense.