The Sierra Club, with over 700,000 members nationwide, is the oldest grassroots environmental organization in the United States. It sees its purpose as preservation, protection, and enhancement of the natural environment.
Article IV, Section 4. This section is called the Guarantee Clause, because by its terms the federal government makes certain guarantees to the states. One of theseâprotection from foreign invasionâcontinued Congress's prior obligation under the Articles of Confederation.
Article IV.--The United States shall, during the term of ten years, counting from the interchange of the ratifications of the treaty, admit to the ports of the Philippine Islands, Spanish ships and merchandise under the same conditions as the ships and merchandise of the United States.