The south eastern region of Mexico’s basin is considered today, to be one of the richest in biodiversity, a natural endowment due to its proximity to Cierra Chichinauhtzin, a mountain range associated to the even larger mountain sierra known as, "Eje neo volcanico Transversal". An area recognized to be one of the richest worldwide.

Already for some time, work at Calpulli Tecalco has focused around documenting a number of plants and animal species, many of which are on their way to extinction in the area. At the same time Calpulli Tecalco has reported the detriment of soils, gullies, hill slides, etc, due to human activity. Evidently, these elements cannot be studied separately, absent of the relationship and cultural baggage developed by locals, a population whose past activities had taught them to make use of this rich environment without excessive damage.

Out of such a relation, people in the region created one of the most efficient systems of cultivation on hillsides known as tlalmoxtli or terrazas, a construction able to take advantage of particular geomorphology in the land, able to retain larger quantities of humidity during the rainy season. A feature of special benefit to crops wrought, but most importantly, a construction able to speed up the accumulation of organic matter and the formation of high quality top soil. Factors, which translated into more abundant harvests, and by extension better alimentary benefits to the population, undoubtedly, this tradition gave way to cultural expressions in close proximity, to woodlands, agriculture and water

From the past, such cultural baggage arrives to us tangled up in religious believes, antique and occidental, merging in a syncretic set of practices, mystical and colloquial reflected through dances and songs, practices that make up the cultural heritage of the area.

This is one of the main objectives at Calpulli Tecalco NGO, the highlighting of cultural elements borne of such an intimate relationship between man and the environment displayed by older generations, as well as the detrimental influence foreign practices have bestowed upon the land, assimilated voluntarily and involuntarily by the indigenous community. Most significantly, the virtual disappearance of the Nahuatl language, the mother tongue of Milpa Alta.
The recovering of our native tongue for these reason, becomes of primordial importance in our environmental quest; the disappearance of our native language may ultimately signify the end of a unique attitude of communion with the world. Our commitment is therefore, the looking after of all these elements material or otherwise present in our community.

Medio Ambiente

Tlalticpactli: Sobre la tierra
Tlancoch,"Diente" = tla
Tlalli, "Tierra" = Tlal
Icpactl, "Madeja de hilo" = icpa