The main purpose of this legislation is to create a special postage stamp, known as the "Combating Invasive Species Semipostal Stamp," to raise funds for programs that address the issue of invasive species in the United States. Invasive species are non-native plants and animals that can harm local ecosystems, threaten native species, and negatively impact local economies. This stamp aims to provide a simple way for the public to contribute financially to efforts that combat these harmful species.