http___metro-portal.hr_debeli-ljudi-mogli-bi-okoncati-nasu-civilizaciju_72036_1.xml
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Humanity could stand to lose a few pounds. If the entire human population stepped on a scale, the weight would be 316 million tons, or 632 billion pounds, a new study finds. The overweight people in the world carry a total of 16 million tons of extra weight — that's the equivalent of 242 million normal-weight people. Obese people carry 3.8 million tons of extra weight, the equivalent of 56 million normal-weight people. "Everyone accepts that population growth threatens global environmental sustainability — our study shows that population fatness is also a major threat," said study researcher Ian Roberts, of the London School of Hygiene and Tropical Medicine. The energy requirement of any species depends not only on the number of individuals in its population, but also on its total mass: the more mass people in the world have, the higher their energy needs will be, the researchers said. Roberts and colleagues used 2005 estimates of the world's population in their analysis. They also obtained information about the average body mass index (BMI) of people in each country, and calculated the percentage of the population that is overweight and obese. The average body mass, globally, was 136 pounds (62 kilograms.) In North America, which has the highest average body mass of any continent, the number was 178 pounds (80.7 kg). North America has only 6 percent of the world's population, but 34 percent all the human biomass in the world that is due to obesity, the researchers said. In contrast, Asia has 61 percent of the world's population, but only 13 percent of the world's biomass due to obesity. If all countries had the same average BMI as the United States, the total human biomass would increase by 63 million tons (58 million metric tons), equivalent to the weight of of 473 million people, the researchers said. The study is published today (June 17) in the journal BMC Public Health. Pass it on: The human population weighs about 316 million tons. MyHealthNewsDaily @MyHealth_MHND. We're also on Facebook & Google+.
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Debeli ljudi mogli bi okončati našu civilizaciju Znanstvenici kažu da će sve veći broj pretilih ljudi na svijetu imati isti učinak na resurse kao i porast populacije za milijardu duša Da je pretilost postala globalni problem svima nam je poznato, no nova studija pokazala je da osobe s prekomjernom tjelesnom težinom ne škode samo svojem zdravlju, već svojim prehrambenim navikama ugrožavaju egzistenciju ostatku svjetske populacije. Naime, britanski znanstvenici tvrde pošto je broj pretilih osoba u svijetu u rapidnom porastu to bi uskoro moglo imati isti razorni učinak na prirodne resurse i hranu kao i porast svjetske populacije za milijardu ljudi. "Svi prihvaćaju da porast populacije prijeti globalnoj održivosti okoliša, no naša studija pokazuje da je i tjelesna težina ključan faktor. Ako nešto ne učinimo po pitanju populacije i debljine šanse su nam minimalne", rekao je dr. Ian Roberts, koautor studije i profesor sa londonske Škole za higijenu i tropske bolesti. Profesor Roberts i kolege su, služeći se podacima UN-a, izračunali da svi ljudi na svijetu zajedno teže oko 287 milijuna tona, od toga 15 milijuna tona otpada na punašne osobe, a 3,5 milijuna tona na pretile ljude. Iako prosječna težina čovjeka iznosi 62 kilograma, zamijećen je ogroman nesrazmjer u pojedinim regijama svijeta. U Sjevernoj Americi prosječna tjelesna težina iznosi 80,7 kilograma, a u Aziji 57,7 kilograma. Studija je objavljena u stručnom časopisu BMC Public Helth.