naator immigratioto saoaulo s slowedgain, ( speaking porguese )slato, but birth rates coinue rease theon. weet a swi dow orwiroctop exceg ib th inhs ci, which, rinher case, s crsed.twtofheop sao o willontinutoe onof world's mega-cies. the urban geography of immigration and ethnic diversity real a complex pattern of squatter settlements and self-construction. with luck and hard work, the newest residents will get their chance to share in the wealth and sophistication thats sao paulo. narrator: large tropicalaiforestsns are qukly shing.rld, here we examine seral emes,s, b than sincluding:16% of bzis rt opical foresecology; maalof sustainabelopmeasuc and ; the amazon rain forest-- and its dirsity ofife.worldfor s the forest ecosystem is delicate bae oflants and animals, soil and water. like geography, ecology is an integrative science, bringingogether many problems into one view. ecologist daelepstad whether he gheria is resinheorescanopyec of wors. mapng ion cpute a spatial pl the ture othe amazon, ndstan t future. tonderstan we reay haveo go back in time and ink abouthe first people who