The Humane Society of the United States (HSUS) is a leading animal protection organization, dedicated to promoting the welfare of animals and advocating for their rights. With a mission to end suffering for all animals, HSUS works through public policy, corporate reform, and education to create a more humane society.

HSUS engages in a variety of programs and campaigns aimed at improving the lives of animals. These include efforts to combat animal cruelty, promote pet adoption, and protect wildlife. The organization also works to improve conditions for farm animals and advocates for humane treatment in various industries.

In terms of sustainability, HSUS is committed to reducing its environmental impact and promoting eco-friendly practices. The organization supports sustainable agriculture and encourages plant-based diets as a means to reduce carbon footprints and conserve natural resources. However, specific details on their carbon footprint or sustainability certifications are not extensively documented.

HSUS collaborates with other organizations and stakeholders to advance its goals, leveraging partnerships to amplify its impact. Through legislative advocacy and public awareness campaigns, HSUS strives to create systemic change that benefits both animals and the environment.