'We can't go on as we are': why sustainability is the big issue of our time

Guardian Sustainable Business launches in Australia today. We've asked a group of leading experts to advise us on our work in this field, and here some of them explain what sustainability means to them, and why everybody should be thinking about it

• What is Guardian Sustainable Business? Find out here

As the world puts its hope in the Paris UN climate change conference to bring real sustainable change to the future of our planet, Guardian Australia is pleased to announce the launch of Guardian Sustainable Business (GSB) in Australia.

Businesses, alongside governments and citizens, will lead the way towards a more equitable, sustainable future. Along with our UK and US counterparts, GSB Australia will investigate the social and environmental impact of business in Australia.