Greenhouse Gases Greenhouse Gases and the Greenhouse Effect Greenhouse Gases, or GHG’s are those unwanted gases that exist in our atmosphere and as such contribute to global climate change, either directly or indirectly by trapping the Earth’s heat and making our planet warmer. Although some of these greenhouse gases occur naturally within the atmosphere, the result of human and industrial activity on the Earth has increased their quantity altering and affecting the atmospheric balance. We all know that the Earth’s…