I don't think justify is the right term at all! Its a good thing not a bad one to increase metal recycling because less gets put in landfill and less needs to be mined from the ground.
How Do You Justify The Increased Recycling Of Metals In Our Society And Across The World?
Justify is the correct term, its straight out of the preliminary HSC Chem course syllabus... Thats pretty much the exact wording... Lol, just need to write out a list of pros and cons, then say why the pros outweigh the cons, if there are any...?