They'll give more blood, recycle more waste, buy more efficient vehicles, wash their clothes at a lower temperature and turn off the tap while they brush their teeth.
As time went on, it took Yeager longer to get outside to relieve himself and it was vastly more efficient to wash a few short rugs he'd dribbled or streamed on.
To cut emissions, airlines could buy newer, more efficient planes, wash turbine airfoils more often to maintain optimal thrust and aerodynamics, land in a straight line guided by satellite rather than the traditional meandering approach and, eventually, power their jet engines with biofuels.
Dishwashers are typically much more efficient than hand washing in terms of energy and water consumption.
Using the machine is more efficient than hand washing, especially if you run full loads.
Advocates say money could be better spent ripping out old appliances and replacing them with more efficient toilets or washing machines.
To make washing more efficient, collect samples with the hair device to one side of the bottom of the well, and use a plastic PT with a narrow capillary ending.
From this point of view, the hydrogel methods prove to be more efficient than the traditional water washing.
This micro-sensor system could play a key role in the development of more efficient and environmentally-friendly washing machines by enabling the measurement of residual detergents.
