Great informative graphics. I remember so well growing up in western PA in the times before serious conservation efforts took place with so much ugly landscape due to over-timbering, strip mining and polluted orange streams from coal mine sulfur drainage. Thankfully legislation was enacted that forced such companies to reclaim and replant the land after raping it and to eliminate mine drainage contamination. My dad, a 44 year coal miner was actually assigned to one of the first cleanup efforts in Indiana County in the late 60s constructing a series of pools that filtered the water draining from his mine before it dumped into Two Lick Creek, which now, all these years later, actually supports a healthy fish population. I only wish he would have lived long enough to see the results of his efforts.