Water (70,9% of Earth)
Only 2.5% of the Earth's water is freshwater, and 98.8% of that water is in ice and groundwater. Less than 0.3% of all freshwater is in rivers, lakes, and the atmosphere, and an even smaller amount of the Earth's freshwater (0.003%) is contained within biological bodies and manufactured products.
On 22 July 2011, a report described the discovery of a gigantic cloud of water vapor, containing "140 trillion times more water than all of Earth's oceans combined," around a quasar located 12 billion light years from Earth. "Discovery shows that water has been prevalent in the universe for nearly its entire existence."
- Atmosphere of Mercury: 3.4%
- Atmosphere of Venus: 0.002%
- Earth's atmosphere: 0.40% over full atmosphere, typically 1–4% at surface
- Atmosphere of Mars: 0.03%
- Enceladus (moon of Saturn): 91%
(political) More than 2.2 million people died in 2000 from waterborne diseases (related to the consumption of contaminated water) or drought ). In 2004, the UK charity WaterAid reported that a child dies every 15 seconds from easily preventable water-related diseases; often this means lack of sewage disposal.
Earth Composition:
- 78.08% nitrogen (N2)
- 20.95% oxygen (O2)
- 0.93% argon
- 0.038% carbon dioxide
- 1% water vapor (varies with climate).
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