Do you think that the substitution of plastics for metals in products traditionally made of metal may be viewed negatively by the public at large? If so, why?

This can be answered by a very simple statement, plastic is an easy product to manipulate.

Explanation:

         When using plastic on products that were usually made out of metal can be a bad thing by the public's view because plastic is a very easy thing to manipulate, and once you use it, it's very easy to discard it.

         Besides that, the amount of space that a plastic product will occupy is pretty much less than the metal ones, and this can be a thing that the public may view as a negative point too.

         The last one is, plastic is easier to produce, yes, the global warming will be a problem with the usage of plastic, but the majority of the people won't think of this as a problem.

frequency or wavelenth of em radiation in a vacuum