In preparation for December’s Climate Change Conference in Copenhagen, advocates for environmental awareness are broadcasting their message to the world’s leaders online. They fear that many of them don’t take the crisis as seriously as they should and aren’t planning enough to prevent global catastrophe. The upper limit of carbon dioxide we can safely have in our atmosphere is 350 PPM (that’s parts per million), and yet, as we all know, we’ve far surpassed that.

There have been many efforts for the cause. On October 15th, more than 13,000 representing 156 countries blogs and 18 million readers participated in Blog Action Day. Its mission was to change the flow of web conversation and create a global discussion about climate change. Together, they increased the number of posts on the issue by about 500%. Talk about empowering the public!

However, it doesn’t end there. Tomorrow, Saturday, October 24th, the world is following up the mission with the International Day of Climate Change. 350.org has called for people to organize at important places within their communities, somehow incorporate the number 350 into an activity, take a picture of the event, and upload it to its website. Then, it will send all of the images to world leaders and media sources.

350.org: Because the world needs to know

If the October 15th campaign is any indication, International Day of Climate Change will be another success — or at least get a rousing turnout. And how is it all accomplished? Why, the usual army of Facebook, Twitter, Flickr, and YouTube.

One strong message with thousands of advocates has a powerful effect when you make that message easy to spread.

Social media can’t change the world, but it a tool to move the process along. Let’s hope the world’s leaders take the appropriate next step. And hey, maybe I’ll see you at the pumpkin carving tomorrow.