Using solar energy "pollutes" also the environment.
1. Less energy is available for other demands. They have to be filled up with other energy sources. (Assuming, that they do not use their own panels for mining.)
It's probably all bullshit. There are papers by professors of music studies claiming listening to streaming services wastes a gigazillion of CO2. It's all just back of the napkin estimates.
Ha. Reminds me of the old warning message that used to come up in rn when you posted something to USENET:
This program posts news to thousands of machines throughout the entire civilized world. Your message will cost the net hundreds if not thousands of dollars to send everywhere. Please be sure you know what you are doing.