Final answer:
Signatory nations have legal and ethical obligations to adhere to global environmental standards and take responsibility for pollution, including marine pollution.
Step-by-step explanation:
Signatory nations have legal and ethical obligations to adhere to global environmental standards and take responsibility for pollution, including marine pollution. The externalities of pollution, such as climate change and biodiversity loss, are global challenges that require collective action. While there may be challenges in enforcing international environmental protection, the need for cooperation and responsibility remains crucial.