What Causes Global Warming? The main causes of global warming is the emissions from carbon-dioxide and methane emissions, then, add deforestation and the Green House Effect to this unfortunate equation and you end up with global warming. This will include a massive climate change which will effect our planet catastrophically, resulting in dangerously high sea levels, rising temperatures, wild weather and the extinction of many animals who cannot acclimatise to the consequences of global warming. Essentially humans are truly the cause the Globe being warmed. We create the carbon dioxide emissions from our transportation vehichles. Methane emissions from our agriculture industries and from rice paddies. From our massive hunger for wood products we use deforestation. These are the main causes of Global warming and they are all derived from the man made industries that starve our earth but feed it's greedy inhabitants for us to live comfortably. These are the causes, but you are the solution.