Watch Me Create a Cloud Using Only My Mouth! You can make a tiny cloud using just your mouth. First, breathe in through your nose and close your mouth to trap warm humid air inside. Then, click your tongue against the roof of your mouth about 20 times with your mouth closed - each click launches microscopic droplets that quickly evaporate, saturating the air with water vapor. Pressing your cheeks builds a little pressure and raises the temperature even more. Finally, release the air in a quick p

The concentration of water vapor, Earth’s most abundant greenhouse gas, is rising as our climate warms. But water vapor isn’t causing human-produced global warming. Instead, it’s amplifying it. Learn why: https://climate.nasa.gov/ask-nasa-climate/3143/steamy-relationships-how-atmospheric-water-vapor-supercharges-earths-greenhouse-effect/ Video: Water vapor in the atmosphere during the summer and fall of 2005. Credit: NASA/JPL-Caltech | NASA Climate Change