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.
Because it is a cleaner source of power than oil or coal, nuclear energy is often mistakenly referred to as a renewable resource. The sources of the energy that people use the world over fall into two general categories: renewable and nonrenewable.While the supply of renewable resources, such as sunshine and wind, is virtually limitless, nonrenewable resource supplies are finite.Some nonrenewable resources, including oil and coal, are the product of millions of years of conversion from fossils, the buried remains of ancient plants and animals.ecause it is a cleaner source of power than oil or coal, nuclear energy is often mistakenly referred to as a renewable resource. The sources of the energy that people use the world over fall into two general categories: renewable and nonrenewable.