The Millennium Ecosystem Assessment: MA Scenarios provide useful insight into the complex factors that drive ecosystem change, estimating the magnitude
of regional pressures on ecosystems and critical uncertainties that could undermine sustainable development. They also provide an understanding of the importance of institutions and values
as the long-range outlook for the world's ecosystems depends on the course taken by global and regional development in the coming decades. The integration of changing ecosystem conditions
into the global scenarios was taken as both effects and causes. The MA scenarios include those for population, income, cereal production and consumption, meat production and consumption,
land cover, waster stress, water availability, acidification and nitrogen deposition.