The Troposphere is the lowest layer of Earth's atmosphere, extending from the surface up to about 8 to 15 kilometers (5 to 9 miles) high. It is where most of the weather phenomena occur, including clouds, rain, and storms, making it crucial for life on our planet. In the Troposphere, temperature generally decreases with altitude, leading to various atmospheric conditions. This layer contains approximately 75% of the atmosphere's mass and is rich in water vapor, which plays a vital role in weather patterns and climate regulation.