"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
When we have done our best, we can, as a united people, take whatever may befall with calm courage and confidence that this old nation will survive and if death should come to many of us, death is not the end.
Hydrogen is used to power a range of new alternate fuel vehicles. The chemical energy of hydrogen is converted by a combustion method similar to current engines or in a fuel cell which produces water and electricity by reacting hydrogen with oxygen.