Sometimes rain is also in the form of snow or ice. This is because the position of the rain is high and the air in the cloud is very cold. Then when the ice falls it will melt into rain because of the warm earth temperature. Then it becomes water droplets. When it snows, it means the land where the rain falls is also cold. Rain can be both a blessing and a danger. Dangerous rain is often known as acid rain. Acid rain is rain that comes from clouds that contain water vapor, dust, salt, smoke, and other pollutants.