[!lemma=obtain] [tag=□]
[!lemma=obtain] [tag=IN]
The notion of using molecules as the working elements of a computer goes back several decades . President Bush used the same economic reasoning when he rejected the Kyoto Protocol in 2001 , an international treaty requiring 35 industrial nations to cut their global-warming gases by 5 percent on average below 1990 levels by 2012 . Damian Clark , 24 , an account manager for an online company and a new Mitchell patient , said his first visit to the Chicago office was an eye-opener , with its blond wood floors , refreshment bar and cool , airy decor . They have also extended these results to spheres and higher-dimensional analogs of circles and to circles on hyperbolic and spherical surfaces . The national telephone survey of 1,200 people was conducted over three weeks in November , more than six weeks after the spinach recall but before the Taco Bell outbreak .