Soil degradation could be worsened by increased erosion caused by higher rainfall, while elsewhere more land could become desert.

BBC: Climate change warning

Eczema can be worsened by stress, heat, dry air and sweating.

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The problem will be worsened by global warming affecting the population balance of animal predators such as owls, snakes, birds and bats, animals that keep insects and rodents in check.

CNN: Global warming may harm human health

Dr Ritchie said he has no experience of seeing someone confined to one place for this length of time but he told the jury it is possible that someone in this situation would have pressure sores which could be worsened by the presence of urine.

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Flooding last year may have worsened the situation on the Mississippi by leaving deposits of silt and debris in areas that would normally be clear.

CNN: STORY HIGHLIGHTS