Note: This is the 1997 edition of UNEP's Global Environment Outlook. If you are interested in more recent information, please see the 2000 and 2002 editions.

Figure 2.21. North American coastal ecosystems threatened by development.

Source:
Bryant, D., et al. (1995).
Notes:
a. Threat ranking depicts potential risk to coastal ecosystems from development-related activities.
b. Coastal areas falling within a city or major port footprint or having a population density exceeding 150 persons per square kilometre, a road network density exceeding 150 metres of road per square kilometre, or a pipeline density exceeding 10 metres of pipeline per square kilometre.
c. Coastal areas with a population density of between 75 and 150 persons per square kilometre, a road network density of between 100 and 150 metres of road per square kilometre, or a pipeline density of between 0 and 10 metres of pipeline per square kilometre.
d. Coastal areas with a population of less than 75 persons per square kilometre, a road network density of less than 100 metres of road per square kilometre, and no pipelines known to be present.