, ▁which ▁see ks ▁to ▁reduce ▁air ▁poll ution ▁through ▁expansion ▁of ▁em issions ▁trad ing . ▁ ▁Bush ▁signed ▁the ▁Great ▁L akes ▁Leg acy ▁Act ▁of ▁ 2 0 0 2 ▁author izing ▁the ▁federal ▁government ▁to ▁begin ▁clean ing ▁up ▁poll ution ▁and ▁cont amin ated ▁sed iment ▁in ▁the ▁Great ▁L akes , ▁as ▁well ▁as ▁the ▁Brown fields ▁Legisl ation ▁in ▁ 2 0 0 2 , ▁acceler ating ▁the ▁clean up ▁of ▁abandoned ▁industrial ▁sites , ▁or ▁brown fields , ▁to ▁better ▁protect ▁public ▁health , ▁create ▁jobs , ▁and ▁rev ital ize ▁communities . ▁ ▁Bush ▁stated ▁his ▁reason ▁for ▁not ▁supporting ▁the ▁Ky oto ▁Pro tocol ▁was ▁that ▁it ▁unf air ly ▁target ed ▁the ▁United ▁States ▁while ▁being ▁deliber ately ▁len ient ▁with ▁certain ▁developing ▁countries , ▁especially ▁China ▁and ▁India . ▁Bush ▁stated , ▁" The ▁world ' s ▁second - larg est ▁em itter ▁of ▁green house ▁g ases ▁is ▁China . ▁Yet , ▁China ▁was ▁entirely ▁ex empt ed ▁from ▁the ▁requirements ▁of ▁the ▁Ky oto ▁Pro tocol ." ▁ ▁Bush ▁also ▁question ed ▁the ▁science ▁behind ▁the ▁global ▁war ming ▁phenomen on , ▁ins isting ▁that ▁more ▁research ▁be ▁done ▁to ▁determine ▁its ▁valid ity . ▁ ▁Global ▁war ming ▁▁ ▁Upon ▁arriv ing ▁in ▁office ▁in ▁ 2 0 0 1 , ▁President ▁Bush ▁with d rew ▁United ▁States ▁support ▁of ▁the ▁then - p ending ▁Ky oto ▁Pro tocol , ▁a ▁UN ▁Convention ▁seeking ▁to ▁imp ose ▁mand