Examining the challenges bitcoin faces including scalability issues, price volatility, and environmental concerns relating to mining
Before saying anything, I will recommend you to read through this thread and learn how bitcoin has become environmental friendly and the mining process is not placing any harm to the environment and people, read further from here.
debunking bitcoin energy in mining bitcoin by fillippone
https://bitcointalk.org/index.php?topic=5325350.msg56613804#msg56613804Other challenges you have mentioned like scalability have been dealt with through the introduction of bitcoin layer 2 protocols.