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youhouu
Ahhha
Air also contains suspended particles known as aerosols, including dust, pollen, sea spray, and human-made pollutants, which affect air quality and weather phenomena.
The atmosphere acts as a protective shield by:
Blocking harmful ultraviolet radiation from the Sun via the ozone layer
Moderating Earth's temperature through the greenhouse effect
Protecting the surface from meteoroids
Redistributing heat and moisture globally through air currents.
youhouu
The composition of air has changed over Earth's history due to volcanic activity, biological evolution (notably photosynthesis increasing oxygen), and more recently, human activities causing climate change and pollution.
In summary, air is a vital, dynamic mixture of gases and particles essential for life, climate regulation, and environmental processes on Earth.
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Meeehhhoioi
In addition to these permanent gases, air contains variable amounts of water vapor, averaging about 1% at sea level but ranging from nearly 0% to over 3% depending on humidity and temperature. Water vapor plays a crucial role in weather and climate by forming clouds and precipitation and acting as a greenhouse gas.