1.

sustainability

/səsteɪnəˈbɪlɪti/

noun

1. the ability to be maintained at a certain rate or level.

   "the sustainability of economic growth"

2. avoidance of the depletion of natural resources in order to maintain an ecological balance.

   "the pursuit of global environmental sustainability"

2.

ethical

/ˈɛθɪk(ə)l/

adjective

1. relating to moral principles or the branch of knowledge dealing with these.

   "ethical issues in nursing"

   Similar:

   moral, social, behavioural

2. avoiding activities or organizations that do harm to people or the environment.

3.

circular economy

based on the principles of designing out waste and pollution, keeping products and materials in use, and regenerating natural systems.

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Ellen McArthur