Introduce el texto aquí

Introduce el texto aquí

1. Troposphere

   • The closest layer to the Earth
   • It contains clouds and air. Some areas are polluted. Pollution comes from volcanoes, factories, cars and power stations. Pollution is bad for our health.

2. Stratosphere

   • It's 12 to 50 km above the Earth
   • It contains the Ozone Layer which protects us from harmful sunrays

3. Outer layers

   • Mesosphere
   • Thermosphere