61.   Since toxic air and water know no national boundaries, U.S. environmental experts are worried.

62.   That used to be the tradition, when businesses were much more settled into various grooves, thanks to existing technologies, regulatory authorities, and national boundaries.

63.   That raises difficult practical and legal issues, because the Internet dissolves national boundaries and allows people to surf at random between sites around the world.

64.   The acquisition will help the company provide credit services more suitable to an age when credit information needs to cross national boundaries, he said.

65.   The contemporary derivatives market is a creature of computers and satellites that allows financial transactions to cross national boundaries at the speed of light, with minimal government regulation.

66.   The Internet is unhindered by national boundaries, so pornographers can simply post their materials on server computers in other countries with more liberal laws.

67.   The Kurds have long complained that history, national boundaries and political alliances have worked against them.

68.   The second is to help the rest of the world grapple with problems that override national boundaries, like global warming and the destruction of biodiversity.

69.   The sky islands exist as a sort of biological Nafta, where national boundaries blur.

70.   The research being done by Ebbesmeyer and Ingraham is a reminder that when it comes to the ocean, national boundaries are meaningless.