Public debt includes local, state, and national government debt, with external debt owed to other countries and organizations. Domestic debt is owed to individuals and businesses within the country. Short and long-term debt affects a country’s debt sustainability, with deficit spending used to stimulate the economy. High levels of debt can lead to economic consequences. […]
Roads are built with various materials depending on their intended use and public demand. Dirt roads were common in the past, but engineers developed new ways to create long-term roads using sand, gravel, tar, paving bricks, asphalt, or concrete. Asphalt is cheap and easy to apply, while concrete lasts longer but needs reinforcement. Some older […]
