Is water vapor a major cause of global warming?

Water vapor is known to be Earth’s most abundant greenhouse gas, but the extent of its contribution to global warming has been debated. Using recent NASA satellite data, researchers have estimated more precisely than ever the heat-trapping effect of water in the air, validating the role of the gas as a critical component of climate change. read more

Water vapour is a powerful greenhouse gas, so it contributes to the natural warming that makes earth habitable. But the prime cause of global warming is CO2 emitted by humans in burning fossil fuels. That burning increases the amount of CO2, increases the amount of greenhouse gas and hence warms the planet. read more

#4: Water vapour amplifies whatever source of warming caused the atmosphere to warm,since atmospheric warming results in raised atmospheric water concentrations. And water vapour is a greenhouse gas as we all know very well. read more