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.
Cole said Routh made the admission in June 2013 â four months after he opened fire on Kyle and Chad Littlefield at a shooting range outside of Ft. Worth. Chris Kyle, former Navy SEAL and author of the book 'American Sniper,' was killed in 2013.