No, water vapor is not considered a stronger greenhouse gas than carbon dioxide (CO2). While water vapor is the most abundant greenhouse gas in the Earth's atmosphere, its effect on the greenhouse effect is considered a feedback mechanism rather than a primary driver.
Carbon dioxide, on the other hand, is one of the primary greenhouse gases responsible for trapping heat in the Earth's atmosphere. It is released through human activities such as burning fossil fuels and deforestation, as well as natural processes like respiration and volcanic eruptions. The concentration of CO2 in the atmosphere has been increasing significantly due to human activities since the Industrial Revolution.
Although water vapor is a potent greenhouse gas, its concentration in the atmosphere is highly variable and largely controlled by temperature. As the Earth warms due to the greenhouse effect, more water vapor can enter the atmosphere, amplifying the overall warming effect. This positive feedback loop involving water vapor contributes to the intensification of the greenhouse effect caused by other greenhouse gases, such as carbon dioxide.
In summary, while water vapor is an important component of the greenhouse effect, carbon dioxide is considered a primary driver of global warming due to human activities.