1.   But other interested parties, including oil-producing countries and many American manufacturers, argue that any action now risks unacceptable short-term economic damage.

2.   Markets alone, most experts concede, may be insufficient to protect the planet from unacceptable environmental damage.

3.   They can endure only modest physical action without sustaining unacceptable damage.

4.   Under the law, the government has almost no power to block a mine even if it would cause unacceptable environmental damage.