even in the course of four or -- forars, i saw animals example, these remarkable frogs from the tropics. i saw some of them and they are not here anymore. they are extinct. there is no going back. we minimize our impact? absolutely. there are a lot of things we can do to minimize what we are doing but we are not getting back those frogs that i saw that no longer exist. tavis: give me some sense of the scale that it would take vis-À-vis our commitment, our engagement, to turn the clock back on what you lay out in the text? >> to take climate change as a central example -- i talk about a couple different phenomena in the book. sometimes say we need to be almost on a wartime footing. whole economy is based on burning fossil fuels which is taking co2 out of the ground and putting it in the air. if you want to change that, you have to really concentrate on it. everything has to go in the right direction. one of the reasons that many people are critical of president obama's policies towards global warming is on the one hand, he says the right things. he says he is committed to reducing carbon

north america only makes up maybe 56% of the revenues forared to closer to 70% zynga, a comparable companyipo. they are becoming diversified in a lot of ways. nonetheless, it's hard not to draw some parallels. certainly, king has had a little more success on mobile, which makes it more attractive in some ways. on the other hand, there is a lot more concentration. in one game is something like 76%. >> who pays money for this cap i played and it was pretty much free. -- who pays money for this? i played and it was pretty much for free. >> you pay for all sorts of things. they posted about $2 billion last year and they are profitable. they get them hooked i getting them to play more rounds and get two different regulars. >> kind of like cigarette sellers. >> i guess. >> it is about addiction, i guess. >> is there a breakdown of what age groups they get the money from? >> not that i've seen. >> i only ask that because i have a 10-year-old son and he starts talking to me about wanting to buy a lifetime thing on this game and i'm just trying to say, you may not play that for your lifetime. but i

important forare ensuring appropriate use for patients with legitimate pain. it is a schedule ii drug. there are additional restrictions on prescribing a special license. there are limits on prescriptions. no regfills. there are special requirements that need to be undertaken and reporting requirements. it is a schedule ii drugs that have these additional requirements to limit the use and hopefully to make sure that it is prescribed and used appropriately. restrictions on the use and also requires the company to make available physician training for its appropriate use. that this is a powerful drive. we also believe that appropriately used, it serves an withtant and unique niche respond to pain medication. it meets the standards for safety and efficacy. recognizing the addiction potential and understanding the broader context of the serious opiate medication abuse and misuse in this country. we weigh carefully risks and benefits. we hope that as a nation we can make progress in addressing all of the issues that contribute to this ongoing and very serious opiat