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.
Witness: Man who killed Chris Kyle said he did it because 'they wouldn't talk to me'. A key prosecution witness told a Texas jury Friday that he overheard a former Marine say he shot Chris Kyle after the American Sniper hero ignored him. Kyle and a buddy were gunned down at a rural Texas shooting range.