Which of the following is a greenhouse gas that comes only from human resources?

Question: Which of the following is a greenhouse gas that comes only from human resources?

The greenhouse gases that humans do emit directly in significant quantities are that carbon dioxide means co2. Accounts for around three quarters of the warming impact of current human greenhouse gas emissions. Carbon dioxide means co2 is the primary greenhouse gas emitted through human activities. In 2019 co2 accounted for about 80 percent of all u.s. greenhouse gas emissions from human activities.