9 9 9 , ▁University ▁of ▁Wisconsin - Mad ison ▁W ge ology . w isc . edu ▁– ▁Ev idence ▁from ▁det rit al ▁z ir cons ▁for ▁the ▁existence ▁of ▁contin ental ▁cr ust ▁and ▁o ce ans ▁on ▁the ▁Earth ▁ 4 . 4 ▁G yr ▁ago ▁Access ed ▁Jan . ▁ 1 0 , ▁ 2 0 0 6 ▁ ▁External ▁links ▁ ▁Late ▁P rec amb rian ▁Super cont inent ▁and ▁Ice ▁House ▁World ▁from ▁the ▁Pale om ap ▁Project ▁▁▁ ▁Category : Ge ological ▁history ▁of ▁Earth <0x0A> </s> ▁Pe at ▁energy ▁in ▁Finland ▁describes ▁pe at ▁energy ▁use ▁in ▁Finland . ▁Pe at ▁has ▁high ▁global ▁war ming ▁em issions ▁and ▁high ▁environmental ▁concerns . ▁It ▁may ▁be ▁compared ▁to ▁brown ▁coal ▁( l ign ite ) ▁or ▁worse ▁than ▁this ▁lowest ▁rank ▁of ▁coal . ▁Pe at ▁is ▁the ▁most ▁harm ful ▁energy ▁source ▁for ▁global ▁war ming ▁in ▁Finland . ▁( H ard ▁coal , ▁which ▁is ▁more ▁harm ful , ▁is ▁only ▁used ▁as ▁an ▁emer gency ▁back - up ▁source ▁for ▁energy , ▁and ▁not ▁in ▁every ▁year .) ▁According ▁to ▁IE A ▁the ▁Finn ish ▁subs id ies ▁for ▁pe at ▁in ▁ 2 0 0 7 - 2 0 1 0 ▁und erm ined ▁the ▁goal ▁to ▁reduce ▁ ▁em issions ▁and ▁counter act ed ▁other ▁environmental ▁policies ▁and ▁The ▁European ▁Union ▁em issions ▁trad ing ▁scheme . ▁ ▁Energy ▁use ▁ ▁According ▁to ▁the ▁national ▁energy ▁statistics ▁the ▁energy