Answer:
Natural Gas can be explosive or flammable depending on it's concentration in air.
Natural gas has a flammability range of approximately 5 to 15 percent.
Any percentage greater than that is explosive for natural gas.
Hope this helps.
Conditions to Avoid: Natural gas is extremely flammable and explosive; avoid heat, sparks, open flames, and all possible sources of ignition. Heat will increase pressure in containers used to store natural gas.Jun 1, 2015
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