The arguments for and against Anthropogenic (human caused) Global Warming (AGW) are just too many to be covered here. However, four key arguments will be mounted against the idea that global warming is mostly caused by humans.
The first three arguments will be that the three major drivers of climate change are: the sun, cosmic rays and the earth's movements relative to the sun.
The final argument will be that the long term historical record of earth's climate shows clearly that the sun, cosmic rays and the earth are indeed the big drivers of climate change and global warming (and cooling). It will be also suggested that these three work cumulatively at times.