Any ideas for 'go green now' campaign material?

I am looking to start an advertising / media campaign showing how our behaviour now - ozone layer, global warming, burning fossil fuels, deforestation, ocean dredging etc - will affect out children in 5 years, 10 years, 20+ years.....must be hard hitting and identifiable to m audience, along the lines of the anti-smoking, speeding, and seatbelt TV ads.