There is a natural greenhouse effect that contributes to warming. Greenhouse gases trap heat and thus warm the Earth because they prevent a significant portion of infrared radiation from escaping into space.
George W. BushThis is my maiden voyage. My first speech since I was the president of the United States and I couldn't think of a better place to give it than Calgary, Canada.
George W. BushThat's a chapter - the last chapter - of the 20th ... 20th ... the 21st century that most of us would rather forget. The last chapter of the 20th century. This is the first chapter of the 21st century.
George W. BushHow do you measure whether or not a strategy of economic growth that is articulated by a very smart, capable economist actually yields growth? You can't. But you can influence.
George W. Bush