When you want to put a dam

but you are not sure how to replace the generators.

 

When you want to put some windmills

but you are afraid that the birds will knock its fans.

 

When you want to put a nuclear powered plant

but you are not sure where to put its waste.

 

When you want to put a coal power plant

but you are not sure how to efficiently fire them.

 

When you want the dam to service continuously

after its loooooong life

and you happened to want to replace the generator

and you happened to found that the generator cannot be replaced

and you happened to wish that the dam could just go away

magically

but then the act of draining and rising of water at each end, should the act be undone,

will flood towns at the drained end of river,

and at the end of the day, all those stones we put there to realise our wishes,

is it worth it in the end?