I believe that temperature around the world has risen because of the impact of humans. However, natural causes might also be a factor. For example: volcanoes erupting or animals breathing out oxygen. Still though, us humans are much more of a bigger factor than the natural causes. We produce most of the pollution levels and carbon dioxide into our earth just in the United States. We are polluting, cutting down trees, constantly transporting, heating houses, and cooking. And we are barely doing anything to stop it. We still have people denying the possibility of humans being the main cause of the carbon dioxide put into the air. I just think it is crazy that people would deny it, and not just try to protect the earth.
There is many things that we need to do to stop the releases of carbon dioxide into the atmosphere. If we keep doing what we are doing to the earth now, which is just smashing the environment, who knows what will happen in the next couple hundreds of years. We need to cut down this trend, and we can start by walking more or carpooling. We also need to start  recycling and reusing much more. We can try to use solar energy instead of other electricity. If people all over the world start doing this, we can make the world a better place.