The lowest layer of the Earth's atmosphere, where most cloud formations and weather occur, is called the troposphere. It is located right above the Earth's surface and extends up to an average height of about 10 to 15 kilometers (6 to 9 miles). In the troposphere, temperature generally decreases with increasing altitude, and it contains about 75% of the total mass of the atmosphere. This layer is vital for sustaining life on Earth as it is the layer where weather phenomena such as rain, snow, storms, and cloud formations take place.
