At the building drain system's lowest point, the drain-waste vent is attached, and rises (usually inside a wall) to and out of the roof. Waste exits from the building through the building's main drain and flows through a sewage line, which leads to a septic system or a public sewer.t the building drain system's lowest point, the drain-waste vent is attached, and rises (usually inside a wall) to and out of the roof. Waste exits from the building through the building's main drain and flows through a sewage line, which leads to a septic system or a public sewer.
Government debt (also known as public debt, national debt and sovereign debt) is the debt owed by a central government.
What is the National Debt? The national debt - aka the federal debt - is the total of all the past years' budget deficits, minus what the government has paid off with budget surpluses. Deficits are common: in the last half century, the federal government has run a deficit in 45 out of 50 years.