How has the human being contributed to the global warming phenomenom

Human industrial activities are believed to be adding to the amount of "greenhouse gases" naturally present in the atmosphere. There are mounting proofs that following the industrial revolution of the 18th and 19th centuries, which commenced in Britain and expanded to several parts of the world, the amounts of carbon dioxide, methane and other greenhouse gases in the atmosphere has inccreased somewhat. Greenhouse gases released from human activities or natural sources and trapped in the atmosphere acting as blanket preventing the earth´s heat from escaping into space, thereby increasing the earth´s temperature, creating variability in the world climate (Climate Change).