What evidence is there to support that humans have increased climate change over ...

When fossil fuels are burned to produce energy (for transport, industry, and so on), a larbe amount of carbon dioxide is released into the atmosphere, being one of the reasons of the greenhouse effect. Since no other species on the planet uses fossil fuels, and since the amount of carbon dioxide in the atmosphere corresponds with the known emission trends, it is obvious that it is the humanity's contribution to the global warming. Of course, natural factors (such as fires or volcano eruptions) also aggravate the greenhouse effect, but their share is not even close to the human-caused factors.