When it says global context all you need to do is use words such as 'worldwide', 'globally' or 'in a global context' and try to avoid using the word indivdual (eg "this affects individuals physical health and wellbeing"), instead use "this effects peoples physical health and wellbeing".
An example is:
Economic sustainability relates to the capacity of future generations to earn an income and the efficient use of resources to allow economic growth over time. It includes ensuring people have jobs in order to earn an income allowing resources such as food, water and healthcare to be purchased. This reduces stress of being able to afford these items, promoting mental health and wellbeing around the world. By receiving income that can be used for nutritious foods, people are less likely to develop CVD or diabetes further promoting physical health and wellbeing worldwide
Obviously you could use much more detail but the point is you use the same links to health and wellbeing as you would when describing how it effects individuations, just include the words globally or worldwide after each point