Innovation is related to, but not the same as, invention: innovation is more apt to involve the practical implementation of an invention (i.e. new / improved ability) to make a meaningful impact in a market or society and not all innovations require a new invention.
Technical innovation often manifests itself via the engineering process when the problem being solved is of a technical or scientific nature. The opposite of innovation is exnovation.
Students of different classes use the waste garbage material and turned the waste material into beautiful decorative items likes flowers etc. This will help to reduce the waste and convert into useful articles.