when did the world population reach 7 billion
World population There is no estimation for the exact day or month the world's population surpassed one or two billion. The points at which it reached three and four billion were not officially noted, but the International Database of the United States Census Bureau placed them in July 1959 and April 1974 respectively. The United Nations did determine, and commemorate, the "Day of 5 Billion" on July 11, 1987, and the "Day of 6 Billion" on October 12, 1999. The Population Division of the United Nations declared the "Day of 7 Billion" to be October 31, 2011.[66]
Human overpopulation According to the Millennium Ecosystem Assessment, a four-year research effort by 1,360 of the world's prominent scientists commissioned to measure the actual value of natural resources to humans and the world, "The structure of the world's ecosystems changed more rapidly in the second half of the twentieth century than at any time in recorded human history, and virtually all of Earth's ecosystems have now been significantly transformed through human actions."[163] "Ecosystem services, particularly food production, timber and fisheries, are important for employment and economic activity. Intensive use of ecosystems often produces the greatest short-term advantage, but excessive and unsustainable use can lead to losses in the long term. A country could cut its forests and deplete its fisheries, and this would show only as a positive gain to GDP, despite the loss of capital assets. If the full economic value of ecosystems were taken into account in decision-making, their degradation could be significantly slowed down or even reversed."[164][165]
World population In demographics, the world population is the total number of humans currently living. The world population was estimated to have reached 7.6 billion as of October 2017[1]. The United Nations estimates it will further increase to 11.2 billion by the year 2100.[2]
World population World population has experienced continuous growth since the end of the Great Famine of 1315–17 and the Black Death in 1350, when it was near 370 million.[3] The highest population growth rates – global population increases above 1.8% per year – occurred between 1955 and 1975, peaking to 2.06% between 1965 and 1970.[2] The growth rate has declined to 1.18% between 2010 and 2015 and is projected to decline to 0.13% by the year 2100.[2] Total annual births were highest in the late 1980s at about 139 million,[4] and are now expected to remain essentially constant at their 2011 level of 135 million,[5] while deaths number 56 million per year and are expected to increase to 80 million per year by 2040.[6] The median age of the world's population was estimated to be 30.1 years in 2016, with the male median age estimated at 29.4 years and female at 30.9 years.[7]