Ultraviolet radiation is the energy range just beyond the violet end of the visible spectrum. Although ultraviolet radiation constitutes only about 5 percent of the total energy emitted from the sun, it is the major energy source for the stratosphere and mesosphere, and it’s vital in energy balance as well chemical composition. Read more..
UN Global Compact is voluntary initiative to encourage businesses to adopt and report on sustainable and socially responsible policies. It seeks to align business operations and strategies with ten universally accepted principles in the areas of human rights, labour, environment and anti-corruption
Underground homes are a term used to describe a house built into the ground or slope of a hill, or which has most or all exterior surfaces covered with earth. Because its earth insulation serves as a thermal mass, it retains warmth in winter and remains cool in summer. Read more.
UNEP united nations environment Program
UNESCO The United Nations educational, scientific and cultural organization