With temperature records around the world breaking ever more frequently, we need to stop increasing the levels of carbon in the atmosphere that are driving climate change.
That's a big challenge that will require bold thinking. Doing nothing is not an option.
The City of Sydney's renewable energy master plan shows how we can wean Sydney off coal-fired power and on Monday night you can join me and a panel of expert speakers to find out how.
Former Greenpeace activist Danny Kennedy is the keynote speaker. Danny co-founded the new California-based solar energy company Sungevity, which is already expanding its operation to Australia and The Netherlands.
He'll be joined by experts from the renewable energy industry, environmental campaigners, community groups and the NSW Farmers' Association.
Tickets are free but bookings are essential. Visit http://whatson.cityofsydney.nsw.gov.au/events/19293-city-conversations-2013 to save your seat.
When: Monday 5 August, 2013
Where: Lower Town Hall, Sydney Town Hall, 483 George Street (entry via Druitt Street)
How: Tickets free and essential from Ticketmaster 136100 or ticketmaster.com.au