When you live in the high Himalayas then everything has to be carried in one way or another. On a recent trek in the Annapurna range we met long trains of yaks and donkeys, and porters all carrying heavy loads for the essentials of life. Rice, sugar, kerosene, coffee, tea, building materials. These porters are carrying the basics for a solar water heating system as well as a roofing and water saving tanks. We also met a son carrying his elderly mother on what was a 6 day journey to a Holy Hindu shrine high in the mountains she wanted to visit before her death.