You wrote: <<Building solar parks is a waste of land which could be used for other purposes (agriculture for example).>> From a stricly economic view, many times a solar park in a very sunny place is more economically efficient than agriculture. That said, including social and political views, of course, we need enough agriculture to feed our societies!
I have unfortunately witnessed fields of orange trees being cut down and replaced with PV panels. Our local market has indeed an oversupply of oranges (to the point that sometimes it's more cost effective not to cut fruit rather than pay employees to do it) but I can't help to think if removing fully grown trees is better for the environment.