door knockers by Mpower

Dear neighbors, I just got a visit from two young men who knocked on my door claiming to be working for "Mpower" which was hired by Duquesne Light (???) to visit every home in "my zipcode" to find out about energy usage. Their spiel was fast and hard to follow, but they seemed to want to know if my energy usage (electric and gas) was above a certain level. If so, they would sell me (???) a green energy plan. They wanted me to check my recent utility statements. I didn't. Anyone else hear from these fellows? Any idea what gives? David