The mean global surface temperature has increased by about _____ over 1850-2020 values.(Fill in the Blanks with the correct answer)

The mean global surface temperature has increased by about 1.2 degrees Celsius over the 1850-2020 values. This increase is primarily attributed to anthropogenic factors, particularly the increase in greenhouse gas concentrations due to activities like burning fossil fuels, deforestation, and industrial processes. The rise in temperature represents a significant change in the Earth's climate system and has been a subject of extensive research and discussion among scientists and policymakers. Global warming impacts various aspects of the environment, including sea-level rise, more frequent and severe weather events, and shifts in ecosystems and wildlife populations. Understanding this increase is crucial for addressing climate change and its potential effects on human society and the natural world.