With today, world population marked 7,052,656,862 on 8 :00 am.July 11th is world population day to create the awareness on population explosion impacts on earth ecosystem.China(1.35 Billion) and India(1.25 Billion) accounts to 1/3rd of world population facing serious threats in water scarcity,food security and limited natural resources to share .India is the main contender for the China by annual population growth rate 1.7% but that of China has 0.6% showing firms signs on surpassing china's population within couple of years.
| Year | Population |
| 1 | 200 million |
| 1000 | 275 million |
| 1500 | 450 million |
| 1650 | 500 million |
| 1750 | 700 million |
| 1804 | 1 billion |
| 1850 | 1.2 billion |
| 1900 | 1.6 billion |
| 1927 | 2 billion |
| 1950 | 2.55 billion |
| 1955 | 2.8 billion |
| 1960 | 3 billion |
| 1965 | 3.3 billion |
| 1970 | 3.7 billion |
| 1975 | 4 billion |
| 1980 | 4.5 billion |
| 1985 | 4.85 billion |
| 1987 | 5 billion |
| 1990 | 5.3 billion |
| 1995 | 5.7 billion |
| 1999 | 6 billion |
| 2000 | 6.1 billion |
| 2005 | 6.45 billion |
| 2010 | 6.8 billion |
| 2011 | 7 billion |
| 2020 | 7.6 billion |
| 2027 | 8 billion |
| 2030 | 8.2 billion |
| 2040 | 8.8 billion |
| 2046 | 9 billion |
| 2050 | 9.2 billion |
