What is the primary role of greenhouse gases in the atmosphere?

The primary role of greenhouse gases in the atmosphere is to maintain a temperature on Earth sufficient to support life. Greenhouse gases, such as carbon dioxide, methane, and water vapor, trap heat from the sun within the Earth's atmosphere. This process, known as the greenhouse effect, is essential for regulating the planet's temperature. Without these gases, heat would escape back into space, leading to much colder conditions that would be inhospitable for most forms of life.

This temperature regulation is crucial because it not only supports the survival of organisms but also influences climates, weather patterns, and ecosystems across the planet. By keeping the Earth's surface warm, greenhouse gases play a vital role in creating and sustaining the diverse environments needed for life to flourish.