Greenhouse gases are thought to be a major culprit in global warming. Gases including carbon dioxide (CO2), methane, and even water vapor, trap heat from the sun and make the Earth warmer – just like glass in a greenhouse traps heat and makes the air inside warmer. These gases exist naturally in the atmosphere, but human activities have increased their concentrations and subsequent air warming to a level that could potentially have disastrous climactic effects.

Tags: environment cause, global climate change, global warming, greenhouse gases