Not exactly hiking, but an important issue for all of us who want protection for the great outdoors.
Hank Green, the EcoGeek explains Cap and Trade in 3:30sec.
Click PLAY or watch it on YouTube.
( via Treehugger – Cap and Trade Explained in Under Four Minutes (Video)
besthike.com 
Last problem, you have iron ore, you have coal, and a few other things, you make steel and get lots of credits. So you stop making steel, send the iron ore etc to China, import the steel and sell your carbon credits.