The definition of urban is relating to a city or of a city with a population of at least 50,000 people. An example of urban is the nature of Manhattan. urban. of or characteristic of the styles and culture of the inner city, esp. of the black inner city: urban music, fashions, etc. urban.
Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.enewable energy resources exist over wide geographical areas, in contrast to other energy sources, which are concentrated in a limited number of countries.
We use renewable energy sources mainly to make. electricity. Electricity and hydrogen are different from the other energy sources because they. are secondary sources of energy. Secondary sources of energyâenergycarriersâ are used to store, move, and deliver energy in easily usable form. Wehave to use another energy source to make electricity or hydrogen. In the UnitedStates, coal is the number one energy source for generating electricity.