Earth is enveloped in a mantle of air and contains numerous layers of gases. The temperature of the Sun is greater than that of Earth. The rays of Sun take a trip through the atmosphere to arrive at the final destination that is Earth and provide warmth to Earth and the heat from the Earth travels back to the atmosphere. Some gases in the atmosphere defend some of the warmth from evading into the space. These gases are known as “greenhouse gases” and this whole process is known as “greenhouse effect” since its working is same as that of the greenhouse. Due to some reasons such as from deforestation and the emission of Carbon dioxide from burning fossil fuels, the Earth’s average temperature is increasing.
The bodies of all the living things are adapted to certain weather conditions. Due to the rise in temperature, the lives of human beings are affecting all over the world. For example, seals and polar bears have to search for new lands for hunting and living, if the ice in the Arctic melts. Most of the plants and animals may not be able to cope with these climatic changes and may die. This can cause the loss of some plant and animal species in certain areas of the world. Although, global warming affects everyone, human beings are at a greater risk due to it. For example, countries near the coastal areas suffer from a greater risk of flood.
How do the global warming effects on humans work?
Global warming is making the Earth very hot and hence level of pollen in the atmosphere is becoming higher. Due to extreme heat more people are dying from cardiovascular as well as respiratory disease. More than 7000 excess deaths were recorded in Europe due to the heat waves of summer in the year 2003. Due to high temperature, the level of Ozone and other pollutants rises and hence more people are suffering from respiratory disease. The global warming effects on humans depend on how people adapt to the changes or how can they reduce the climate changes in the world by making their contribution.
How do variable rainfall and natural disasters play their role in casting effects of global warming on humans?
Increasingly variable rainfall is likely to affect the supply of clean and fresh drinking water. Lack of pure and safe water can increase the risk of diarrhea. In extreme cases, drought and famine are caused due to water scarcity. Drought will increase the prevalence of malnutrition which is a cause of 3.5 million deaths per year currently. By the end of 2090, climate change will double the frequency of extreme drought, widen the areas affected by drought and increase their average duration six-fold.
Floods are also increasing in intensity and frequency. Floods heighten the risk of water borne disease, contaminate fresh water supplies and produce breeding grounds for mosquitoes and disease carrying insects.
Today, the number of weather related natural disasters has tripled and are causing 60, 000 deaths every year in developing countries. Rising sea level and extreme weather conditions will destroy medical facility, homes and other essential services. People living near the sea will be forced to move, which heightens the risk of health problems because they are adapted to live near sea only. Global warming effects on humans have put forth an alarming state for the human race and if measures are not taken to control the level of pollution, Earth would become unfit for human race to survive for long.