In the lecture, the speaker contends that some experts do not agree on wave-energy facilities. This contradicts the reading's assertion that wave farms will be common in the future because of its many advantages.
To begin with, the lecturer states that there is a technical problem in these facilities. As technology hasn't developed sufficiently, using wave farms is also unstable. This challenges the reading's claim that wave farms are reliable generators of power which are constant and predictable.
Second, the lecturer points out that wave farms contain harmful fuels. In particular, the turbine has highly toxic materials. This counters that the reading's claim that wave farms are environmentally friendly as they do not envolve the burning of fossil fuels.
Lastly, the lecturer claims that wave farms have a negative impact on the natural beauty of the surrounding landscape. To be specific, they are highly visible with bright color and close to shore.