[originaltext] President Bush has left on his first official trip to Europe.

President Bush has left on his first official trip to Europe. His first stop is Spain. Ties between the United States and many of its European allies are tense because of differences on environmental and defense issues. Earlier Mr. Bush announced a big increase in American research into the causes of the problem of warming in the atmosphere. He said the research would include ways to correct it without hurting the economy. He again criticized the 1997 Kyoto Global Warming Treaty. He said it is unfair to the United States and does not include other nations that poison the atmosphere like China and India. Many European leaders and environment experts have criticized Mr. Bush’s decision to reject the treaty.
Q: Which treaty did Mr. Bush criticize?