Rajindra Pachauri is known for his command of the science and economics of global warming. The 68-year old chair of the International Panel on Climate Change brings to his position a wide-ranging background in academia, business, and government. Last week, the engineer and economist took time away from the international panel--the scientific body that has documented the science of global warming under its United Nations charter--to visit the California Air Resources Board. The long-bearded Indian spoke to a couple hundred people in Sacramento the day after the agency unveiled its sweeping draft plan for cutting greenhouse gases. Pachauri summarized the science of global warming and its likely effects and mitigation, which includes a price on carbon, that is projected to cut the world\u2019s economic output 3 percent by 2030. His most important message was not about science or technology, however, but about human attitudes and values. \u201cIt\u2019s wrong to believe there would be a burden with\u201d transforming energy use, he said. Instead, it\u2019s really a matter of changing \u201cattitude and values.\u201d To illustrate the point, Pachauri told the story of when he arrived in Washington to speak at a carbon capture and sequestration conference. \u201cI have a beard and come from a part of the world where somebody\u2019s hiding in the hills of Afghanistan,\u201d he joked. As a result, it took him a long time to get through security and meet the driver waiting to usher him to the meeting. When he arrived at the car, he found the driver had run the vehicle and its air conditioning system for two hours while he was getting through customs. He asked why and the driver replied it was to make sure he would be comfortable. \u201cI said, for heaven\u2019s sake I\u2019m going to be uncomfortable throughout the journey now because the thought will bother me.\u201d Pachauri said he mentioned this incident to indicate how \u201cwe accept waste all around.\u201d While Pachauri is now known as a globetrotter who frequents conferences in Europe, North America, and throughout Asia, he grew up in India, a land in which resources are used more sparingly. \u201cWhen I was a child, I remember when we bathed we were given a bucket of water.\u201d He noted, in contrast, how common it is for people to take 20 minute showers in the West. \u201cI don\u2019t see any loss of welfare or happiness. We can still be happy with a five minute shower and feeling alright and smelling fine after that.\u201d The seemingly mundane stories are illustrative of why Pachauri thinks that consumption is as much or more of a problem in global warming and resource management as population growth. He recalled meeting former Senator Tim Wirth one time, who he quoted as saying: \u201cWe add 3 million people a year and each person adds 40 times what a Bangladeshi consumes each year. So we add 120 million.\u201d The lesson, he took away: \u201cPopulation is important but you have to look at consumption.\u201d Moreover, to reduce population growth, it will be necessary to spur economic development in poor nations that increase the status of women and to bolster support for contraceptive programs. Thus, to address climate change effectively, people will have to change their attitudes, values, and lifestyles, he concluded. In the U.S., California is about to find out if it is up to that challenge.