The document summarizes the layers of the atmosphere, including the exosphere, thermosphere, mesosphere, stratosphere, and troposphere. It also lists the primary gases in the atmosphere, with nitrogen comprising 78% and oxygen 21%. The text then discusses climate change, noting that in the past the Earth was cooler but it is now getting hotter due largely to human activities causing global warming. Some consequences of global warming mentioned are melting glaciers, flooding cities, changing climates, and drying lakes. The document concludes by stating the need to make changes such as recycling, reusing, and considering alternative energy methods.

1. THE ATMOSPHERE
Àlex Bultó
Arnau Folch
Fernando Rogel
Igor Dulcet

2. The layers of the atmosphere
1.Exosphere (space)
2. Linosphere
3. Mesosphere
4. Stratosphere
5. Troposphere

3. Atmospheric gases
• Nitrogen 78%
• Oxygen 21%
• Other gases 1%

4. Climate change
• In the past: Earth is cooler
• Now: Earth gets hotter
Human activities are a major
cause of global warming!

5. Global warming. The consequences…
• Our glaciers are melting
• Our cities are flooding
• The Climate is changing
• Our lakes drying

6. We need to make a
change!
• Recycle and Reuse
• Consider alternative energy methods
• Reuse plastic bags