What Is David's Argument On The High Cost Of Wind?

Within David’s reflection, you can see that he’s talking about both side of the argument on the high cost of wind. He reflected on how expensive it will be if we take off coal plants line by replacing it with wind generation so that it can have clean the air. Hence, in meeting the demand it will be a little bit more expensive to accumulate wind. He links it back to the renewable sources which are; carbon emissions,land use, and so forth.