- Agricultural yields are expected to decrease for all major cereal crops in all major regions of production.
- The availability of water will be affected by melting of glaciers, particularly in areas such as the Indus basin and western China, where much of the river flow comes from melt water.
- Population increases, combined with changes in river run-off as a result of changes in rainfall patterns and increased temperatures, could mean that by 2080 significantly less water is available to approximately one billion people already living under water stress.
- For many areas of the world sea-level rise, combined with the effect of storms, will threaten low-lying coastal communities. There are often very dense populations living along coasts, as well as important infrastructure and high-value agricultural land, which makes the impact of coastal flooding particularly severe. The intrusion of salt water on farming land, and the risk to lives of flooding events could affect millions of people worldwide every year.
The impacts shown on the map are frightening, and the list is not exhaustive. However, the map represents a world where climate change has gone unmitigated, where we have continued to emit greenhouse gases at the rates we are today. If we continue to do this, then the likelihood of the planet warming by 4 C (7 F) increases, and as it does, so the risk of these impacts being realised also increases.