The Atmosphere is Still Changing
Human activity is chaning the atmosphere:
- Burning fossil fuels releases CO2 - as the world's become more industrialised, more fossil fuels have been burnt in power stations and in car engines
- Deforestation - contributes to the increase in CO2 levels. Trees take in CO2 from the atmosphere, therefore getting rid of a whole load of trees means more CO2 is left in the atmosphere
- Livestock farming - releases huge amouns of methane, CH4, into the atmosphere - animals produce it when they pass wind. The large population of dairy and beep cattle is to blame
Volcanic activity is changing the atmosphere:
- Sulfur dioxide - thrown high into the atmosphere when volcanoes erupt, sulfur dioxide gas reacts with sunlight, water, oxygen and dust to form volcanic smog
- Carbon dioxide - released into the atmosphere by volcanic eruptions
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