A few weeks ago, during our presentation at the EABIS Colloquium, I recounted some daunting numbers delivered by Simon Zadek, Chief Executive of AccountAbility-  precluding positive outcomes for global climate change – the greatest emerging humanitarian challenge of our time.

This week, I offer another number:  350. And a date: October 24. 

That’s 350 parts per million - the number scientists say is the safe upper limit for carbon dioxide in the atmosphere. 

And Saturday October 24 is International Climate Action Day – a global event that is shaping up to be the largest grassroots environmental action since Earth Day. 

It’s like a universal potluck– only, instead of food - you bring hope, ideas and strength in numbers.  This is a tipping point, you see – a big buildup to Copenhagen in December, when World leaders decide to either take real, decisive action to save our planet, economy, people – or continue business and politics as usual.

With a tangible goal (get below 350 ppm) and 4,000 actions in 169 countries on Saturday – the  signs for change are physical, metaphorical – and, well, global.

So, on Saturday – I’ll bike into our City Center with my family and stand with a few thousand other people working toward a profound and lasting shift in behavior, policy and business. 

See you there?