Motley Fool analyst Blake Bos gives his take on some of the media comments regarding the Goldman Sachs Group's (NYSE:GS) recent trip to California to visit with Tesla Motors  (NASDAQ:TSLA)

In the video below, Tesla sales projections for North American vehicles for 2017 and beyond are compared with the 2012 sales volume of  BMW's and Audi's entire vehicle lineup. Do these sales goals support the current Tesla market valuation? 

Blake discusses the scientific consensus estimate of a 7% average decrease per year for the cost of battery technology. He also shares the main reason why the decrease from 2011 to 2012 was double that estimate.

Lastly, Blake talks about alternative fuels and also gives an example of how Berkshire Hathaway (NYSE:BRK-A) has chosen to invest in battery technology.