In an unprecedented television and internet event, ABC News is asking you to help answer perhaps the most important question of our time - What will our world be like over the next one hundred years if we don’t act now to save our troubled planet?

The world's brightest minds agree that the "perfect storm" of population growth, resource depletion and climate change could converge with catastrophic results.

We need you to bring this story to life - to use your imagination to create short videos about what it would be like to live through the next century if we stay on our current path. Using predictions from top experts, we will feed you detailed briefings from the years 2015, 2050, 2070 and 2100 - and you will report back about the dangers that are unfolding before your eyes.

Your videos will be combined with the projections of top scientists, historians, and economists to form a powerful web-based narrative about the perils of our future. We will also select the most compelling reports to form the backbone of our two-hour primetime ABC News broadcast: Earth 2100, airing this fall.