===> How many people live on Earth?
As of Friday, April 29, 2016; 6:15:51am, the total population of the world is 7,250,104,514.
Source: U.S. Census Bureau
Surface pressure: 1014 mb Surface density: 1.217 kg/m3 Scale height: 8.5 km Total mass of atmosphere: 5.1 x 1018 kg Total mass of hydrosphere: 1.4 x 1021 kg Average temperature: 288 K (15 C) Diurnal temperature range: 283 K to 293 K (10 to 20 C) Wind speeds: 0 to 100 m/s Mean molecular weight: 28.97 Atmospheric composition (by volume, dry air): Major : 78.08% Nitrogen (N2), 20.95% Oxygen (O2), Minor (ppm): Argon (Ar) - 9340; Carbon Dioxide (CO2) - 400 Neon (Ne) - 18.18; Helium (He) - 5.24; CH4 - 1.7 Krypton (Kr) - 1.14; Hydrogen (H2) - 0.55 Numbers do not add up to exactly 100% due to roundoff and uncertainty Water is highly variable, typically makes up about 1%Magnetosphere
Dipole field strength: 0.3076 gauss-Re3 Latitude/Longitude of dipole N: 78.6 degrees N/70.1 degrees W Dipole offset (planet center to dipole center) distance: 0.0725 Re Latitude/Longitude of offset vector: 18.3 degrees N/147.8 degrees E
Note: Re denotes Earth radius, 6,378 km
Source: Planetary Sciences at the National Space Science Data Center