Carbon footprint refers to the collection of greenhouse gas emissions caused by corporate organizations, activities, products or individuals, and it indicates the carbon consumption crown of a person or group. Carbon is natural resources composed of carbon elements such as oil, coal, and wood. Carbon consumes much more, and carbon dioxide, the culprit that causes global warming, is also produced, and the carbon footprint is large, otherwise, the carbon footprint is small. Based on the above definitions, Which of the following actions may not necessarily reduce personal carbon footprint:. ['Go to bed early and get up early to exercise.', 'Advocating for no pets.', 'Eat more vegetables and less meat.', 'Choosing buses to reduce self-driving.']