, ▁having ▁served ▁as ▁the ▁chairman ▁of ▁the ▁J oint ▁Cl imate ▁Change ▁Cong r essional ▁Commission ▁– ▁C MM C , ▁and ▁vice - ch air man ▁of ▁the ▁Commission ▁of ▁Foreign ▁Affairs ▁and ▁National ▁Def ense ▁of ▁the ▁House . ▁He ▁was ▁the ▁Brazil ian ▁Green ▁Party ' s ▁president ial ▁candidate ▁in ▁the ▁ 1 9 9 8 ▁election . ▁In ▁ 2 0 1 0 , ▁he ▁was ▁elected ▁to ▁the ▁Brazil ian ▁national ▁parliament ▁( 2 0 1 1 – 2 0 1 4 ) ▁but ▁decided ▁not ▁to ▁run ▁for ▁re e lection ▁in ▁ 2 0 1 4 . ▁▁ ▁He ▁is ▁currently ▁the ▁executive ▁director ▁of ▁the ▁Brazil ian ▁Cl imate ▁Center ▁think ▁tank . ▁He ▁was ▁the ▁Co ordin ator ▁of ▁the ▁Brazil ian ▁Forum ▁for ▁Cl imate ▁Change ▁from ▁October ▁ 2 0 1 6 ▁to ▁May ▁ 2 0 1 9 . ▁working ▁with ▁government , ▁business , ▁and ▁civil ▁society ▁st ake hold ers ▁in ▁the ▁implementation ▁of ▁the ▁Brazil ian ▁National ▁Det erm ined ▁Comm it ment . ▁He ▁was ▁a ▁member ▁of ▁the ▁Brazil ian ▁deleg ations ▁to ▁the ▁UN F CC C ▁Con ferences ▁of ▁Berlin , ▁Montreal , ▁B ali , ▁C open hagen , ▁Dur ban , ▁Wars aw , ▁Lima , ▁Paris , ▁Mar ra ke ch , ▁Bonn ▁and ▁Kat ow ice . ▁He ▁is ▁one ▁of ▁the ▁prom ot ers ▁of ▁the ▁concept ▁of ▁carbon ▁" pos itive ▁pr icing " ▁and ▁of