Which of the following is not a good$$ "design for$$ environment" practice or$$ principle?

A$.$

Parts should be disassembled with common tools.$$

B$.$

Gold is a material highly encouraged in product designs under Design for$$ Environment, as it is abundant on$$ earth, non$-$toxic, and has high recycling potential.

C$.$

Products should minimize energy consumption both during their$$ manufacturing, as well as during use with consumers.

D$.$

Products should be designed with materials that have high potential for$$ recycling, and are$$ non$-$toxic.