Alpineor Tough Trek involves strenuous trekking to altitudes predominantly above 4000 mts/13000 ft with excursions and pass crossings of between 5000 mts/16500 ft and 6000 mts/19200 ft. Pre-trek trainingis essential.
"An ecosystem is a unit of biological organisation interacting with the physical environment such that the flow of energy and mass leads to a characteristic tropic structure and material cycles." -Eugene Odum "the grandfather of ecology"