protect (something, especially an environmentally or culturally important place or thing) from harm or destruction
conserve
following the usual or widely accepted way of doing things
conventional
something wanted or needed
requirement
an amount that has to be paid or spent to buy or obtain something
cost
to supply or make available (something wanted or needed)
provide
to bring into existence
generate
not depleted when used
renewable
available as another possibility
alternative
able to be maintained at a certain rate or level
sustainable
relating to or determined by the sun
solar
relating to an atom or atoms
atomic
a lack of something needed
shortage
the good use of time and energy in a way that does not waste any
efficiency
a law, regulation, procedure, administrative action, incentive, or voluntary practice of governments and other institutions
policy
relating to the nucleus of an atom
nuclear
the using up of a resource
consumption
to get control a source of energy to use it for a purpose
harness