10,000
_ 4,564
1 answer
http://www.google.com/search?q=earth+system&rlz=1C1AVSX_enUS414US423&oq=earth+system&aqs=chrome..69i57j0l5.4362j0j8&sourceid=chrome&espv=210&es_sm=122&ie=UTF-8#es_sm=122&espv=210&psj=1&q=10%2C000++-+4%2C564
_ 4,564
1 answer