This slide presentation reviews the changing global ecosystem in comparison to the growing human population. The presentation includes information on urbanization and productivity

Imhoff, Marc Lee

NASA Technical Reports Server

https://ntrs.nasa.gov/search.jsp?R=20090042962 2019-08-30T08:27:18+00:00Z

% of Land Area
Transformed for Agriculture
World Population
g
(Negligible) 6 -10 Million
fir.	 ,. Land Cover Type
43% of Land Area	 World Population
Dominated by Agriculture 6.5 Billion
%	
iJ	 ^• T
of Land Area	 World Population	 6.9
Built-up
3 -6%
	
6.5 Billion

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CHINA
Percent of Soils (UN/FAO) Covered by Lights
Number of Factors Limiting Agriculture
AVHRR (1982-1998)
CASA (land)
F-
4 20 yr average - NPP (Supply)
	 56.8 Pg C
UN/FAO + Models
NPP Required (Demand)
	
11.5 Pg C
It:__ ^ - -
	
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300%
South
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TLs-
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Can Earth's Plants Keep Up with Us?...Satellite View of Globabl Demand on Products of Photosynthesis

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