Read the following excerpt from a research article on climate change:
'According to a 2021 report by the Intergovernmental Panel on Climate Change, global temperatures have risen by approximately 1.2 degrees Celsius since the late 19th century. This increase has been largely attributed to human activities, including the burning of fossil fuels and deforestation.'
Based on the excerpt provided, which of the following statements best summarizes the main idea of the research?