Citizens of the world have been given a
and worrying health warning –
of us will be classed as obese or
by 2035. The World Obesity Federation (WOF) has warned that in just over a
, more than four billion people will be too heavy for their own well-being. There are
over a billion obese people in the world. The
rising rates are among children and adolescents. The WHO defines obesity as "
or excessive fat accumulation that presents a
to health". A body mass index (BMI) over 25 is considered overweight, and over 30 is obese. In June 2013, the American Medical Association classified obesity as a
. Many health
have described it as a pandemic.