  After direct detection gravitational radiation in 2015 many authors are
publishing remakes of their old articles about this radiation. I decided to
follow this line in my Lecture delivered at the Conference "Varcosmofun'16"
(12-17 September 2016, Szczecin, Poland, EU). Namely, I have presented at this
Conference an updated summary of my past articles on gravitational radiation.
As a base for my presentation I have used mainly the article published in 2002
in Annalen der Physik \cite{Gar3} and the articles \cite{Gar4}.
  In these past articles I have showed that the real gravitational waves which
possess a non-vanishing Riemann tensor always carry energy-momentum (and also
angular momentum). Our proof have used canonical superenergy and supermomentum
tensor for gravitational field in former articles and the averaged relative
energy-momentum tensor in latter. In this article we confine to the
energy-momentum only.
