There are sceptics who disagree

How can I know whether climate change is really a problem?

The scientific research in the climate change field is constantly improving the models from which they get their results and the field of research is inherently a process in development. The developed takes place through discussion between scientists and disciplines. When reading critiques, it is important to keep in mind  that climate science is extremely complex and models used in different scientific fields account for different parameters and different submodels in their modelling. Though it is acknowledged that the climate has always had large variations including ice ages, the IPCC has now, based on observations and relations to greenhouse gas emissions, declared that there is a clear relationship between human activities and temperature rise.