a campaign
... that a campaign to conserve the Narmada River centering around a 2,930-kilometre (1,820 mi) yatra has reached more than 30 million people?
... that <b id="mwBGw"><a href="./Narmada_Seva_Yatra" id="mwBG0" rel="mw:WikiLink" title="Narmada Seva Yatra">a campaign</a></b> to conserve the <a href="./Narmada_River" id="mwBG4" rel="mw:WikiLink" title="Narmada River">Narmada River</a> centering around a <span about="#mwt44" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"2930"},"2":{"wt":"km"},"adj":{"wt":"on"}},"i":0}}]}' id="mwBG8" typeof="mw:Transclusion">2,930-kilometre (1,820</span><span about="#mwt44" typeof="mw:Entity"> </span><span about="#mwt44">mi)</span> <a href="./Yatra" id="mwBHA" rel="mw:WikiLink" title="Yatra">yatra</a> has reached more than 30 million people?