This approach, government regulation, is the most obvious solution to some complex environmental problems, especially ones involving global commons like the oceans or the atmosphere.
Water has historically been classified a 'common good' or part of the global commons which has led to overexploitation and poor management.
In this case they are concerned with returning water back to the global commons.
Over the years a number of international agreements have been drawn up for the management of various global commons.
Knowledge has been held to be an example of a global public good, but also as a commons, the Knowledge commons.
"Space is a global commons under international treaty and international law."
Dahm, D. (2008b): Towards the governance of local and global commons.
The environment component looks at what rich countries are doing to reduce their disproportionate use of the global commons.
One issue that specifically affects the global commons is global warming/climate change.
The Internet and the resulting cyberspace may be considered a global commons.