41.   No industrial country has yet ratified the treaty negotiated four years ago in Japan.

42.   That approval is expected Thursday, and the convention will take effect when two countries have ratified it.

43.   That means that, with the United States out, just about every other industrialized country must ratify.

44.   The complex balancing of interests aims at getting countries to ratify the Kyoto Protocol.

45.   The greatest stumbling block is how many and which countries must ratify the treaty for it to go into effect.

46.   The greatest stumbling block is how many and which countries must ratify the treaty before it enters into force.

47.   The treaty comes into effect after all countries ratify it, and it lasts indefinitely.

48.   The U.S. withdrawal has cast doubt on whether the treaty could be ratified by enough countries to make it a binding international treaty.

49.   There have been suggestions that pro-Kyoto countries could ratify the treaty at the next full-fledged negotiating meeting scheduled for Bonn in July.

50.   Thirty countries must ratify the treaty for it to enter into force.