“The US still hasn’t joined the most important international agreement to conserve biodiversity, known as the Convention on Biological Diversity (CBD). And it isn’t just a small, inconsequential treaty. Designed to protect species, ecosystems, and genetic diversity, the treaty has been ratified by every other country or territory aside from the Holy See. Among other achievements, CBD has pushed countries to create national biodiversity strategies and to expand their networks of protected areas.
Since the early 1990s — when CBD was drafted, with input from the US — Republican lawmakers have blocked ratification, which requires a two-thirds Senate majority. They’ve argued that CBD would infringe on American sovereignty, put commercial interests at risk, and impose a financial burden, claims that environmental experts say have no support.”
https://www.vox.com/22434172/us-cbd-treaty-biological-diversity-nature-conservation