The ability to achieve global sustainability is strongly influenced by population growth;
Many natural systems are inherently variable. Such variability is easily confused with the impact of human activity on the environment. Distinguishing between inherent and man-made variability in natural systems and their capacity to respond to change is important subject for research;
For some environmental issues (for example, those involving the oceans and atmosphere), the planet must be regarded as a single complex system whose interests are best served by coordinated international action. Both developed and developing nations have a common interest in resolving global environmental issues;
Most actions to achieve environmentally sustainable economic development will take place at the national or local level, while at the same time taking into account the interdependence of nations. Individual countries will need to develop approaches to solving sustainability problems that are tailored to their own rate of economic development, cultures, religions, and political systems;
The achievement of environmentally sustainable economic development is dependent on adequate technical education at all levels and on education on how to balance economic, social, and environmental goals.