- - A constituent of the water we all need
- - Gas making up over 20% of Earth's atmosphere
- - Element of cunning required with female lacking information
- - Element before tent or bar
- - Gas that's an important part of the air we breathe
- - Element forming part of water and air
- - Oh, sounds like it's in the tent
- - About a fifth of the air
- - About 21 percent of air
- - Gas forming part of air and of water
- - Kind of mask
- - Scuba tank content
- - Roughly 21% of the atmosphere
- - Contents of some tents
- - Part of H2O
- - Stuff in a tent
- - About 21% of air
- - The 'O' of H2O
- - About 21% of the atmosphere
- - Kind of mask or tent
- - Type of mask
- - Type of tent
- - Tank contents
- - Element carried by hemoglobin
- - Information found behind animal, yak initially, for gas
- - It's in your water
- - gas, symbol o
- - o, elementally speaking
- - in photosynthesis: carbon dioxide + water → sugar + ?
- - Orthodoxy generally includes a common element
- - Chemical element O
- - gas vital to life
- - two hydrogens and one .............
- - Most abundant element in Earth's crust
- - TV channel named after a chemical element
- - Proxy general has a breather
- - Gas essential for life
- - Gas needed for combustion
- - what anaerobes don't need
- - zero knowledge about algebra variables is needed for living
- - Life gas
- - Human need
- - Gas, O
- - Gas discovered by Joseph Priestley, d. 1804
- - Element with the symbol O
- - Element essential for animal life
- - Colourless, odourless, tasteless non-flammable gas
- - Chemical element
- - Colorless gas
- - Life-giving gas
- - Name given to Joseph Priestley's "dephlogisticated air" by Lavoisier, who first recognised it as an element, in 1777
- - A gas
- - TV channel named for an element
- - Element in water
- - Vital gas
- - Cunning but not to start with having information on gas
- - Oscar co-ordinates knowledge element
- - Atmospheric gas
- - O, on the periodic table
- - Space shuttle gas
- - Gaseous element, atomic no. 8
- - You take it in
- - Gas in scuba tanks
- - Essential gas
- - Gas in a tank
- - 39-Across component
- - Breathing need
- - Astronaut's tankful
- - You can't live without it
- - Gaseous element supporting combustion
- - Space station supply
- - Scuba gear element
- - Common gas
- - Gives one a breather in everyday atmosphere
- - Network co-founded by Oprah Winfrey
- - Element #8
- - It's in the air
- - O may stand for it
- - Trendy place to get gas?
- - "Inhale" network
- - Space shuttle supply
- - Astronaut's supply
- - Element in chlorophyll
- - O, in many cases
- - Ambulance tankful
- - Mask supply
- - Cable television network started by Oprah Winfrey
- - Gas in the air
- - Plants release it
- - Most abundant element in the earth's crust
- - Burning need?
- - Important element.
- - It's all around you
- - * :o)
- - Gas
- - Scuba tank filler
- - Something in the air
- - O (gas)
- - Gas produced by photosynthesis
- - Gas we need to breathe
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