If you look at the colored map at the bottom, which classified the countries of the world depending on the application or non-application for summer, you’ll discover that the world is deeply divided on this.
While some States still use the DST (blue color), like most of the United States of America and the United Kingdom, the timing of the other states on its application (orange color), such as Egypt and China, while not applied to other countries of origin (red color), such as Saudi Arabia and Qatar and many of the States of South Africa.
Adopted DST on a large scale during World War II, while Germany was the first country to apply during the First World War, the purpose is the early Independence Day save for an hour of time in order to save power consumption, but scientists assert that things are no longer like the past, and that the savings achieved by the DST now of the energy with respect to 0.03%.
However raises the DST of concern for many, for example, confirms the 40% of Americans are affected by changing the timing, the human body needs at least 4 weeks to adapt to the previous change, and return to the usual pattern of growth, which affect the balance production of hormones in the body and metabolism.
In addition, the researchers monitored the fluctuation in the level of study for students in the short period following change of timing, because of the suffering of the students of the sleep disorders, difficulty concentrating, loss of appetite, the same reasons almost flying out of the rates of collisions by 30%, in particular incidents of the collision of vehicles with animals on the roads of America.
Scientists say that DST has increased by 25% in the number of patients with heart and circulation visitors to hospitals during the three days following to modify the timing, as well as an increase of 15% in requests for sick leave for employees in during the same period due to a weak immune system that results from the disorder of the cycle of day and night.
Not only damage to humans, in cows it takes to 14 days approximately after adjusting the timing to return to the same rate of milk production are the usual ones.
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