This changed the way cities are because cities are usually built to accommodate highways and roads. Built in and around highways have changed the main structure of present-day cities.
a federal tax is paid to the federal governemnt
The answer is high pressure. In a nuclear reaction process, high temperature and high pressure is required for turning hydrogen nuclei into a helium nucleus. It is impossible for it to happen simultaneously because it requires tremendous amounts of energy. Extreme conditions are required for the atoms to overcome electrostatic repulsion.
