Climate changes also will lead more chance of disease. The temperature increase for the CEE region is the extension of favorable zones for infectious diseases such as dengue fever, the West Nile virus and malaria. According to the World Health Organization, global warming will led to a major increase in insect borne disease in Britain and Europe, as northern Europe becomes warmer, ticks and sand flies carrying encephalitis and Lyme disease are likely to move in. the disease will impact a very large consequences for food security, water availability and health. As a further effect of global warming, diseases like malaria are returning into areas where they have been extinguished earlier. Widespread outbreaks of infections like malaria, dengue fever, tick-bone encephalitis, and diarrheal illnesses. People living in poverty will be hardest hit by the global surge in infectious diseases. Disease-carrying mosquitoes are spreading diseases as the climate allows them to survive formerly inhospitable areas. Dengue fever viruses which carried by mosquitoes were previously limited to elevations of 3,300 feet but recently appeared at 7,200 feet in the Andes Mountains of Colombia Major effect of Global Warming has been noticed in the behavior of the wild life. Various species has extinct due to global warming. The ways how the animals react to a warmer environment can prove that from major changes which are caused due to global warming. Global warming could threats to human’s health. In warmer temperatures, bacteria are usually more effective and multiply much faster compared to cold temperatures. A serious threat to asthmatics could be presented when there is a rising temperatures increase ground-level ozone smog production. Spread of tropical diseases like, malaria and dengue to larger regions. Deaths and illnesses could be increase with the longer-lasting and more intense heat waves. Smog pollution in some areas increased by global warming would intensify pollen allergies as well as asthma. Over the last several decades, the number of pollen allergy and asthma sufferers has increased worldwide. In this case, some researchers gave opinion that this could be an early health effect of human-caused climate change. Local air quality problems can be aggravation by the hotter conditions, and it is already affecting more than 100 million Americans. Allergies can be worsening by air pollution, as in diesel exhaust particles able to interact with pollen and deliver it deeper into pollen. Besides, climate change, such as floods and droughts has the ability to reduce the availability of food. Hence, hunger and malnutrition could be increase. After all, the price of correct treatment will rise at the same time.