International Reducing CO2 Emissions Day, also known as World Day for the Reduction of CO2 Emissions, is observed worldwide every January 28. This day aims to highlight the greenhouse effect and encourage individuals to reduce their carbon footprint and care for the environment. The observance emphasizes the significant increase in greenhouse gases, particularly carbon dioxide, since the Industrial Revolution due to human activities such as power generation, transportation, and industrial processes. People are encouraged to learn about the harmful effects of CO2 emissions and take action by adopting environmentally-friendly practices, such as using public transportation, recycling, and reducing energy consumption. Although the origins of the day are unclear and it is not officially recognized by the United Nations, it serves as a reminder of the importance of environmental consciousness. International Reducing CO2 Emissions Day should not be confused with Zero Emissions Day, which is celebrated on September 21.