Natural definitions

EM definitions

1. Environment:

1. The social and cultural forces that shape the life of a person or a population. http://dictionary.reference.com/browse/environment
2. The sum total of all surroundings of a living organism, including natural forces and other living things, which provide conditions for development and growth as well as of danger and damage.  http://www.businessdictionary.com/definition/environment.html
3. The air, water, and land in or on which people, animals, and plants live: Certain chemicals have been banned because of their damaging effect on the environment. We're not doing enough to protect the environment from pollution. http://dictionary.cambridge.org/es/diccionario/britanico/environment

2)Litospher:

a.The solid portion of the earth (distinguished from atmosphere,hydrosphere ).

http://dictionary.reference.com/browse/lithosphere

b. The outer part of the earth, consisting of the crust and upper mantle, about 100 kilometers (62 miles) thick.

http://www.thefreedictionary.com/lithosphere

c.A lithosphere  is the rigid outermost shell of a rocky planet, and can be identified on the basis of its mechanical properties.

http://en.wikipedia.org/wiki/Lithosphere

3) Biome:

1. major regional or global biotic community, such as a grassland or desert, characterized chiefly by the dominant forms of plant life and the prevailing climate. http://www.thefreedictionary.com/biome
2. a complex biotic community characterized by distinctive plant and animal species and maintained under the climatic conditions of the region,

4) Population:

A.the total number of persons inhabiting a country, city, or any district or area.

http://dictionary.reference.com/browse/population

B.All of the people inhabiting a specified area.

http://www.thefreedictionary.com/population

C.A population is a summation of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding.

http://en.wikipedia.org/wiki/Population