You can read about it here
A lot of services now accept Bitcoins as a payment option so I am not much concerned with the Tesla announcement. I recently purchased NordVPN for example and they accepted bitcoins and even a few other coins as well like Litecoin. The growth of Bitcoins is going to come from mass acceptance and I am sad that tesla made that announcement but I am sure more services will accept Bitcoins soon.
Bad news happens a lot of time on Bitcoin Market, so this kind of announcement isn't new. Besides Tesla's announcement is somehow dumb since power energy doesn't rely on coal or fossil fuels alone. If that is one of their reason, they should stop transacting with banks since banking sector consumes a lot of energy too.
Don't buy their excuss towards eliminating bitcoin unto them they made it on purpose, Musk want to manipulate the narket but he failed this time he didn't create much deeper impact since bitcoin still at 50,000$ above, I believe after this power excuss for sure he will be back hyping bitcoin again.
That tweet about Bitcoin being bad to the environment was a bad decision made by Elon Musk. It mad him look dumb. As if he didn't know before that Bitcoins are creating through a process called mining and that mining uses electricity intensive hardware Well, he is only Elon Musk so why would he understand a thing or two about energy expenditure and mining hardware?