That article, and your quote, doesn't seem to support your pushback.

Of course, if a solar panel is broken, ground up and falls into a canal, it would put some heavy metals into the water.

The risk is basically zero and far lower than any other power generation source. It is a nonsense, bad faith "concern".

You're more likely to convince someone by pointing out the valid parts of their concerns than to outright dismiss them as rightwingers.