Which air gas is the main cause of increased temperature (global warming)?

Carbon Dioxide is the primary greenhouse gas responsible for increased global temperatures, a phenomenon known as global warming. It traps heat in the Earth's atmosphere, largely due to human activities like burning fossil fuels.

• Oxygen is vital for respiration but does not contribute to the greenhouse effect.
• Hydrogen is not a significant atmospheric gas contributing to global warming.
• Nitrogen is the most abundant gas in the atmosphere but is largely inert and does not trap heat.

Understanding the role of greenhouse gases is fundamental to comprehending climate change.