General Motors Co (NYSE:GM) CEO Mary Barra on Wednesday said that all cars will be emissions free in 25 years but the current dynamics where Tesla Inc (NASDAQ:TSLA) is dominating sales) will change. What Happened: Barra sees vehicles being either electric or hydrogen fuel cells 25 years down the line. “But it will be emissions free, yes,” she said in an interview with David Rubenstein at The Economic Club of Washington DC. “General Motors have always taken electric vehicles seriously and even had the ‘EV1’ 20 plus years ago,” Barra said, referring to the electric car produced by the company in…