The world needs to invest a whopping $45 trillion in new energy and environmental technologies to meet the twin challenges of climate change and energy depletion.
green-investment

Cleantech Needs $45 trillion investment, G8 Says
A Hundred Year Bridge: The Green Grandma Speaks
The I35 bridge collapse in Minneapolis has people all over the country talking about bridges, roadways, infrastructure needs, and political culprits on all sides of the legislative aisle. The Green Grandma complains that we should ALSO be talking about the things bridges go over and the things they carry: the Mississippi River is at hazard during any rebuilding of the interstate bridges crossing it, the posterity of America needs consideration in our on-going investments.
http://livegreenlivesmart.org/blogs/green_grandma/archive/2007/08/21/a-hundred-year-bridge.aspx