Sustainability is defined through 3 overall and interconnected areas: Environment, Social and Economy.
It was the definition from the Brundtland report from 1987. And still used around the globe, i.e some companies have a triple bottom line. Meaning not only the economy is measured, also the social area is monitored as well as the impact on the environment.
In 2015 almost all leaders around the world signed a shared and agreed upon blueprint, the Sustainable Development Goals (SDGs), which is an urgent call for action by all countries – developed and developing – in partnership. They recognise that ending poverty and other deprivations must go hand-in-hand with strategies that improve health and education, reduce inequality, and spur economic growth – all while tackling climate change and working to preserve our oceans and forests.
Modern use of the term sustainability is broad and difficult to define precisely, however the SDGs make sustainability to act and measure upon.
Many environmentalists and ecologists argue that sustainability is achieved through the balance of species and the resources within their environment. As this is typically practiced in natural resource management, the goal is to maintain this equilibrium, meaning available resources must not be depleted faster than resources are naturally generated.
Whether or not the economical aspect is considered, sustainability is all about a balance and a very much indeed about the co existing between the biosphere and human civilisation.
The SDGs are 17 overall goals and 169 subgoals. These are all a picture of areas around the globe out of balance. And all goals are to be succeeded by 2030.