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Life in the Concrete Jungle was created on 2008-09-16.
half a kilo approximately
No. Half Life: Opposing Force does not require neither Half Life nor Half Life: Blue Shift.
60 pound of concrete bag makes 1/2 cubic foot of concrete
No, only Half-Life and Half-Life: Decay.
The time it takes for half the atoms in a sample of a radioactive element to decay is called the half life.
Antibiotics do not have a half life.
You say 'I've missed Half my life' which is short for : "I have missed half my life'
The term is called half-life. It is the time it takes for half of the radioactive nuclei in a sample to decay.
With Concrete
Buy Half Life: Source Or Buy Garrysmod a Half-Life 2 Modification and get the addon "Half-Life Rennaisance" Link to Half Life Rennaisance: http://www.garrysmod.org/downloads/?a=view&id=57033 Enjoy!