Yee-Haw! Mega news from across the pond as Obama rules out tar sand pipeline, Keystone XL.Is this as momentous a moment in the climate fight as it seems? Won't Donald Trump just undo it all anyway? And is Obama really as green as all that?Ol's off with man-flu, so Dave interviews David Turnbull from US climate campaigners Oil Change International.Sustainababble is your weekly comedy podcast about politics, prattle and the planet. Out Mondays.Music by Dicky Moore from Bearcraft and Dream Themes.Available on iTunes, Stitcher, Soundcloud, and on sustainababble.fish. Visit us at @thebabblewagon and at Facebook.com/sustainababble(Music from today's show: 'Pipeline' by Dick Dale; 'Atmosphere' by Russ Abbott.)