This week on Earth Matters we have Vivien Langford speaking with Beyond Zero Emissions CEO Vanessa Petrie about BZE’s presentations to the Ecocity 2017 worldwide summit about Zero Carbon Communities and Zero Carbon Cement.  Then we hear from Water Keeper Neil Blake speaking to Jan Bartlett about his role protecting the waters of Port Phillip Bay and some of the key challenges that inform his work.Guests:  Vanessa Petrie, Beyond Zero Emissions, www.bze.org.au  & Neil Blake, Port Phillip Baykeeper, www.bay-keeper.com, www.waterkeeper.org.Thanks to Jan Bartlett, www.3cr.org.au/hometime-tuesday and Vivien Langford, www.3cr.org.au/beyondzero, for providing content for this program.