Emissions refer to the release of gases into the atmosphere. The most discussed are greenhouse gases (GHGs) like Carbon Dioxide (CO2), Methane (CH4), and Nitrous Oxide (N2O).

These gases trap heat, leading to global warming and climate change. Major sources include:

• Burning fossil fuels (coal, oil, gas) for electricity and transport.
• Industrial processes and manufacturing.
• Agriculture (livestock digestion, fertilizers).
• Deforestation (reduces CO2 absorption).

Understanding sources helps identify solutions.