Robert Hirsch ASPO A year and a half ago, we featured a presentation by Robert Hirsch, the author of the first major US government report on peak oil.

Peak oil is the theoretical point in time when oil production peaks and begins to fall.

He recently reiterated his argument at this year's Association for the Study of Peak Oil conference in Vienna.

Before he began his remarks, Hirsch made sure to clarify that while he still believes the world faces a liquid hydrocarbon crunch, the broader energy picture is not all that gloomy.

"Longer term, I totally believe we are going to electrify a lot of our technologies and we are going to have a better longer term future, it just won't happen quickly," he said.

To better understand Hirsch's argument, we decided to combine his new presentation with his 2010 presentation to illustrate why even after all the new bullish news on energy, he remains skeptical.