sci

• The earth's atmosphere is divided into different layers and is made of different types of gases
• Composition of earth's atmosphere

  • Nitrogen (more than 3/4)
  • Oxygen (1/5)
  • Carbon dioxide, water vapor, ozone, and other trace gases (1%)
• The gases in the atmosphere produce important weather features such as cloud and rain, and have considerable influence on the overall climate of the earth through the greenhouse effect and global warming
• Greenhouse


  A structure with walls and roofs made chiefly of a transparent material such as plastic or glass, used to grow seedlings and protect plants from harsh weather conditions and insect attacks
• Greenhouses allow sunlight to enter but prevent heat from escaping, warming the inside of the greenhouse
• Greenhouse effect


  The process where greenhouse gases trap the heat in the atmosphere, making the earth much warmer than it would be without an atmosphere
• Greenhouse gases


  • Carbon dioxide
  • Methane
  • Ozone
  • Water vapor
  • Nitrous oxide
• The greenhouse effect is a natural process that plays an important role in making the earth a comfortable place to live
• Due to human activities, more greenhouse gases are emitted into the earth's atmosphere, resulting in an enhanced greenhouse effect and global warming
• Sources of greenhouse gas emissions

  • Burning fossil fuels for electricity, heat, and transportation
  • Deforestation and land clearing for agriculture
  • Soil degradation
  • Agricultural activities
  • Waste management
  • Industrial processes
  • Refrigeration and consumer products
• Global warming can lead to melting of polar ice caps, flooding of low-lying areas, reduction in biodiversity, and changes in climate patterns