17. Below are some of the predicted effects of global warming. Tropical diseases eg malaria may spread to temperate regions such as UK. Climatic and vegetation belts would move. Low-lying areas would be flooded eg fens There could be an increase in insect pests like aphids and fleas. Hot regions would become hotter and deserts would spread. Ice caps and glaciers will start to melt causing sea levels to rise further Some plants and animals would become extinct. There may be more violent storms and weather extremes Sea temperatures will rise. Water will expand and sea levels could rise by 0.25-1.5m