Endocrinology: The study of the medical aspects of hormones, including diseases and conditions associated with hormonal imbalance, damage to the glands that make hormones, or the use of synthetic or natural hormonal drugs. An endocrinologist is a physician who specializes in the management of hormone conditions.
According to IEA (2009) worldwide 1.456 billion people (18% of the world's population) do not have access to electricity, of which 83% live in rural areas. In 1990 around 24 percent of the world's population lacked access to electricity. India was only 43% electrified in 1990 in terms of household access but by 2015 95% of villages had some electric access. In 1979 37% of China's rural population lacked access to electricity entirely. Some 23% of people in East Java, Indonesia, a core region, also lack electricity, as surveyed in 2013.
So if a world population of 11 billion is probably unsustainable, how many people, in theory, could Earth support? Bradshaw says that it is nearly impossible to say what this number would be, because it is entirely dependent on technologies like farming, electricity production and transport â and on how many people we are willing to condemn to a life of poverty or malnutrition.