Global Warming Facts



  • Global warming is the increase in average temperatures around the world. This increase has been between 0.3°C and 0.8°C over the 20th century.
  • Most scientists now think that global warming is caused by human activities, which have resulted in an increase in the Earth’s natural greenhouse effect.
  • The greenhouse effect is the way that certain gases in the air – notably carbon dioxide – trap some of the Sun’s warmth, like the panes of glass in the walls and roof of a greenhouse.
  • The greenhouse effect keeps the Earth pleasantly warm – but if it increases, the Earth may become very hot.
  • Many experts expect a 4°C rise in average temperatures over the next 100 years.
  • Humans boost the greenhouse effect by burning fossil fuels, such as coal, oil and natural gas that produce carbon dioxide.
  • Emission of the greenhouse gas methane from the world’s cattle has added to the increase in global warming.
  • Global warming is bringing stormier weather by trapping more energy inside the atmosphere.
  • Global warming may melt much of the polar ice caps, flooding low-lying countries such as Bangladesh.
  • Recent observations show global warming 14 could be much worse than we thought.