The wonderful site Worldchanging presents issues on changing the world - from environmental sustainability, emerging technologies, molecular engineering, civil participation... as they state on their site:
'Worldchanging shows us a different world - the future we could create. A bright green future, a sustainable, prosperous, dynamic future for all. On a planet full of problems, Worldchanging calls attention to solutions, illuminating tools, models and ideas for building that future.
We have a choice to make. We can build a future of green products and industry, renewable energy and leapfrogging technologies, clean water and fresh air, livable cities and healthy children. Or we can have another kind of world'
To see a slide show of some thoughtful world pictures - go here - and view the slides (choose your format - I would recommend windows media as it downloads without crashing).