Stricter conservation measures, like mandating more efficient washing machines, would easily wring more water from existing supplies, critics say.
Another problem with the existing system, critics say, is that the airlines are responsible, and that as long as their main goal is getting passengers on airplanes on time, the thoroughness of the checks will vary with the length of the line of people waiting to be cleared.
And the existing parks, critics claim, are unattractive and underutilized.
Most of the money for the projects will come from existing programs, and critics condemned the plan as an attempt to divert attention from the reluctance of wealthy nations to reduce trade subsidies, which many economists say hurt farmers in poor countries.
Some businesses have gotten the state to give them Empire Zone tax benefits even though they were moving to areas outside the existing zones, leading critics to charge that the program no longer brought businesses to zones, but zones to businesses.
Critics say existing rules are routinely flouted by doctors.
She lived long enough to see her work accepted by French critics as "existing in its own right".
The bill uses the wording: "Notwithstanding any other provision of law," a phrase that if it became law would trump all existing legislation, according to critics.
And Chris Bretherton of the University of Washington, Seattle, who chaired a 2012 study of climate models by the U.S. National Research Council, says critics of existing models have yet to present convincing evidence that stochastic modeling could do a better job.
Mr. Rogers, a veteran of digital music well known by music executives and musicians alike, has been a longtime critic of existing digital music services; in 2006 he called iTunes "a spreadsheet that plays music".
However, it was Lord Prescott, who was the most voluble critic of existing press standards and regulation, complaining that "the PCC code of conduct is voluntary, it is agreed with the industry and it is up to the industry to observe it".
