Scientists are very concerned about the changes in concentration of carbon dioxide in the Earth’s atmosphere. The graph below shows the concentration of carbon dioxide in the atmosphere between 1988 and 2014. The trend shown in the graph above may continue for many years. Explain what effect the changing concentration of carbon dioxide in the atmosphere could have on living organism – 7088

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1. Higher levels of carbon dioxide (CO₂) cause global warming. This can make plants grow faster because there’s more CO₂ for photosynthesis and higher temperatures help too.
   Global warming also changes weather patterns. Some places get less rain, which can lead to desertification. This means plants die out, animals have less food, and only drought-resistant plants survive. Other places get more rain, which can cause flooding, destroying habitats and leading to extinction.
   Warming also melts ice caps and glaciers, which causes sea levels to rise and more flooding. This again leads to loss of habitat and possible extinction.
   Animals and birds may also change where or when they migrate because of changes in temperature and environment.

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