No! usa is not underground,but some cities ,hotels,etc are underground.
There are underground secret prisons that the government isn't telling us.
"underground" in the context of being below the surface it is "Untergrund" As the "Underground" (US Subway) is "U-Bahn" short for "Untergrundbahn"
underground
The Irving Mall
At mt. Vernon.
The Underground Railroad?
The currents underground make us have easrthwaves.
Which underground tunnel?? Tell us the game. If it is heartgold, soulsilver, firered, leafgreen, ruby, emerald, sapphire... Tell us!
Lewiston, N.Y.
yes
Underground injection is the process of pumping waste water underground (hence avoiding the cost of purification). The US EPA (Environment Protection Agency) has strict laws about what and where. See the link below.
No, but the government is still working on it