Global warming can be seen as a resource issue in two ways. It is a resource issue because resources cause it and it is a resource issue because it might affect some of our natural resources.
Global warming is a resource issue because it is caused by the sorts of resources that we have. We need energy to run our modern economies and lifestyles. However, there are not many good ways to get energy. The most convenient and cheapest is fossil fuel. This is our greatest energy resource, but it causes global warming. If resources like hydroelectricity and geothermal electricity were more widely available, or if resources like wind, solar, or wave power were easier to tap, global warming would not be such an issue.
Global warming is also a resource issue because it can have an impact on our natural resources. One of our major natural resources is land. Global warming can deprive us of some of that land. Rising sea levels would inundate areas that are near to sea level. This would deprive some small island countries of their entire land area.
Because global warming is caused in part by the resources we have (and those we don’t) and because it can have an impact on our resources, it is a resource issue.