<P> In January 2007, the Federal Way (Washington State) School Board voted to require an approval by the principal and the superintendent for teachers to show the film to students and that the teachers must include the presentation of an approved "opposing view". The moratorium was repealed, at a meeting on January 23, after a predominantly negative community reaction . Shortly thereafter, the school board in Yakima, Washington, calling the film a "controversial issue", prevented the Environmental Club of Eisenhower High School from showing it, pending review by the school board, teachers, principal, and parents . It lifted the stay a month later, upon the approval by a review panel . </P> <P> In the United States, 50,000 free copies of An Inconvenient Truth were offered to the National Science Teachers Association (NSTA), which declined to take them . Producer David provided an email correspondence from the NSTA detailing that their reasoning was that the DVDs would place "unnecessary risk upon the (NSTA) capital campaign, especially certain targeted supporters," and that they saw "little, if any, benefit to NSTA or its members" in accepting the free DVDs . In public, the NSTA argued that distributing this film to its members would have been contrary to a long - standing NSTA policy against distributing unsolicited materials to its members . The NSTA also said that they had offered several other options for distributing the film but ultimately "(it) appears that these alternative distribution mechanisms were unsatisfactory ." </P> <P> David has said that NSTA Executive Director Gerry Wheeler promised in a telephone conversation to explore alternatives with NSTA's board for advertising the film but she had not yet received an alternative offer at the time of NSTA's public claim . She also said that she rejected their subsequent offers because they were nothing more than offers to sell their "commercially available member mailing list" and advertising space in their magazine and newsletter, which are available to anyone . The American Association for the Advancement of Science publication ScienceNOW published an assessment discussing both sides of the NSTA decision in which it was reported that "David says NSTA's imprimatur (i.e. endorsement or sanction) was essential and that buying a mailing list is a nonstarter .' You don't want to send out a cold letter, and it costs a lot of money,' she says .' There are a thousand reasons why that wouldn't work ."' </P> <P> A Washington Post editorial called the decision "Science a la Joe Camel", citing for example that the NSTA had received $6 million since 1996 from Exxon Mobil, which had a representative on the organization's corporate board . David noted that in the past, NSTA had shipped out 20,000 copies of a 10 - part video produced by Wheeler with funding provided by ConocoPhillips in 2003 . NSTA indicated that they retained editorial control over the content, which David questioned based on the point of view portrayed in the global warming section of the video . </P>

What global problem was the focus of the year 2006