Celebrating International Reducing CO2 Emissions Day Each year on January 28th, we celebrate International Reducing CO2 Emissions Day — a day dedicated to raising awareness and inspiring innovation to minimize our role in climate change. What exactly are CO2 emissions, and what impact do they have on the environment? Carbon dioxide (CO2) emissions are a heat-trapping gas released primarily from the burning of fossil fuels. From the vehicles we drive to various large-scale