Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increas

Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere. Carbon dioxide ($\text{CO}_2$) is a major greenhouse gas. An increase in atmospheric $\text{CO}_2$ concentration enhances the greenhouse effect, trapping more heat from the sun within the Earth's atmosphere, leading to a rise in global average temperatures. This direct relationship means higher $\text{CO}_2$ levels correlate with increased global warming.