Heavy metals, like pesticides, are long lasting and can spread over large areas. Algae and fish are disappeared and natural processes of adsorption stops. These changes in biosphere resulted in global warming.
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Tornadoes are another problem caused by heated water. This phenomenon was proved by Carter who stated that tornadoes are caused by temperature increase and storm chasing. He illustrates this fact stating that the escalation in extreme weather conditions over the past two decades has led to an increase in the frequency and intensity of storm conditions" (Carter, 2005). Some scientists try to explain tornadoes and storms as a result of changing weather conditions neglecting the influence of global warming on this process. They say: "When we look at the Mozambique floods, at the storms that hit France, at the absence of winters in Britain over the past few years, at the avalanches in the Alps, we are witnessing events that are now clearly tainted by human actions" (Carter, 2005). The question is "Why changing weather conditions occur?" Following Carter, it is possible to say that these changes occur because of global warming.
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To conclude, it is possible to say that the majority of scientists agree that global warming and "green house effect" are the main reasons why we suffer from hurricanes, tornadoes and storms, and as predicted, will suffer even greatly if do not take pain to reduce pollution. Economic science states that tornadoes and hurricanes have a great impact on economic situation in many countries, and have a negative influence on market situation in the world. They ruin crops and resulted in famine, they ruin houses and caused death of thousands of people.
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The impact of human activities on the global warming is evident. Humanity is caused severe weather by a number of ways, including pollution and drilling. People have always polluted their surroundings, but throughout much of history, pollution was not a major problem.