The antonyms for the phrase "consign scrap heap" would be to salvage or rescue. Salvage refers to the act of saving or recovering something that has been discarded, while rescue means to save from danger or harm. Both of these antonyms signify a positive outcome, opposed to the negative connotation of throwing something away, which consigning to a scrap heap implies. Moreover, salvaging and rescuing are forms of sustainability and waste reduction, which are essential in preserving our environment. By salvaging or rescuing a discarded item, we are able to give it a new purpose and extend its lifespan, contributing to a more sustainable and eco-friendly future.