What do you understand by sustainable procurement?

Sustainable procurement is the process by which organization meets their needs of goods and services in a way that generates benefits for organization during the entire life cycle of products (including services) and further benefits the society, community and minimizes negative impact to environment. Economic benefits implies revenues and cost (initial cost, operation and maintenance cost, demolition cost, recycling cost) during product or project life cycle; social benefits refers to the notion of equality, justice, safety, security, employment conditions, empowerment which fosters a spirit of individual excellence and harmonious teamwork in ethical working environment; environmental management refers to minimizing pollution to air, soil, water and conserving natural resources;  ecological balance; promoting health and safety

i found this link which may answer your question                                                                       https://www.cips.org/supply-management/opinion/2014/february/the-10-primary-principles-of-sustainable-procurement/

Sustainable procurement comes down to achieving your (quality/price/service/delivery/other conditions) goals while harming hone / adding to society as a whole. Judge all your procurement activities against that simple criterion.

Sustainable Procurement is an upgraded version of regular procurement in which an organization while achieving its goal also pay attention to social, environmental & economic impact by its spending. In addition, it also helps generate organizational benefit along with social & economic gain while maintaining the least adverse impact on environment