the world population reached 2 billion in ad 1000.
when did the world population reach 2 billion?
ad 1000
world population conferences





























bullet::::- a world population conference was held in geneva in august and september 1927, organized by the league of nations and margaret sanger.





























under the auspices of the united nations, five further world population conferences have been held. they are:





























bullet::::- first world population conference, august–september 1954, rome, italy





























bullet::::- second world population conference, august–september 1965, belgrade, yugoslavia





























bullet::::- third world population conference, august 1974, bucharest, romania





























bullet::::- fourth world population conference, august 1984, mexico city, mexico





























bullet::::- fifth world population conference on population and development, september 1994, cairo, egypt.





























section::::see also.
world population conferences
according to the most recent (july 2015) revision of the official united nations world population prospects, the world population is projected to reach 8.5 billion by 2030, up from the current 7.3 billion (july 2015), to exceed 9 billion people by 2050, and to reach 11.2 billion by the year 2100. most of the increase will be in developing countries whose population is projected to rise from 5.6 billion in 2009 to 7.9 billion in 2050. this increase will be distributed among the population aged 15–59 (1.2 billion) and 60 or over (1.1 billion) because the number of children under age 15 in developing countries is predicted to decrease. in contrast, the population of the more developed regions is expected to undergo only slight increase from 1.23 billion to 1.28 billion, and this would have declined to 1.15 billion but for a projected net migration from developing to developed countries, which is expected to average 2.4 million persons annually from 2009 to 2050. long-term estimates in 2004 of global population suggest a peak at around 2070 of nine to ten billion people, and then a slow decrease to 8.4 billion by 2100.
sustainability