<p>  Tesla sales are falling off a cliff in key markets around the world as its CEO Elon Musk's reputation keeps tanking. Sales in California fell almost eight percent in the fourth quarter of last year and are down 12 percent overall for the year, as Bloomberg reports. Registrations for the company's best-selling vehicle, the Model 3, slide by over a third in the state. Similarly, the EV maker's performance is down in almost every single European market, with year-over-year sales dropping over 63 percent in France. Even in Sweden and Norway, key markets for the company, Tesla lost a […]</p>