We have come to the end of this course.
Before you take the final test,
I would like to say goodbye and wish you all the best,
not just with the test but also with, hopefully,
using the insights you gained in this course in your daily lives.
We have addressed the metals challenge in this course and we have
placed that in the context of the United Nations Sustainable Development Goals.
The Sustainable Development Goals represent
a global quest for a better life for everyone on the planet.
As you have learnt, there are goals for many aspects of life,
eradicating poverty, promoting economic growth,
education and health, improve equality in different respects,
and also address the issues of climate change and environmental degradation.
You might think that reaching all of those goals is not realistic,
and then you will be correct in one respect.
Some of these goals,
as we have explored, are apparently contradictory.
We will really have to find our way forward in solving this,
but you will be incorrect in other respects.
The previous set of goals,
the Millennium Development Goals,
were also very ambitious.
Yet, we managed to realize a lot of them as was explained in one of the clips.
So, it's a good thing to set ambitious goals and not impossible to reach them.
That will guide societies into a direction that is good for everyone.
The metals challenge clearly shows the apparent contradiction between the different SDGs.
We have seen that metals are indispensable for economic development.
We've also seen that the production of metals causes environmental impact,
especially related to energy and climate change.
The SDGs on economic development therefore,
are apparently at aughts with the SDGs on climate and nature protection.
So, the metals challenge can be translated as how can we
meet the development goals without further degrading planetary health.
In the course, we have explored different options for that using different materials,
going for different production processes,
exploring options for a different product design,
keeping products in use longer or realizing better recycling rates.
We have found that all of these options
contribute to some extent in solving the metals challenge.
We've also found that integrating all of these options in
one overarching concept of circular economy may be the best way to go.
Keeping products in use longer helps reducing the demand for new metals.
Recycling metals, which means using old materials instead of new,
helps in a major way to reduce greenhouse gas emissions.
Of course, all this is easier said than done.
Many things need to change in our global society before that can become effective.
For one, the stock dynamics of metal systems have shown that demand needs to stabilize
which happens of itself only when
the global population has reached a certain level of welfare.
Moreover, in the lectures on material and product design,
we have concluded that there are a lot of technological challenges to overcome.
In the lectures on recycling and remanufacturing,
we have concluded that we are far from where we want to be and
that we need to overcome many barriers in society to get there.
All this means a lot of work to be done.
A lot of governmental policies to be put in place to provide the right incentives.
A lot of company policies to change,
to realize these changes in production,
and a lot of changes in consumer behavior to install the pool for
producers and the push for all kinds of collection systems needed for recycling,
remanufacturing, and so on.
But it can be done and the SDGs may help in doing that.
And if it is done,
we will be in a much better shape.
The challenge is ours to solve.