They called me once two days ago and three times yesterday. All four times they stayed on the line after getting my answering machine. I could hear someone breathing (not in a creepy fashion, just breathing) and some activity in the background. They hung up after 10 seconds or so each time. Very strange.

I got a creepily similar call just a moment ago.
They said that same thing about an environmental survey but asked about energy efficiency instead of air quality. "Call Somebody Inc" showed up on my caller id, along with a local phone number. They wanted to know things about the size of our home, gas or electric, if our power bill was average, etc. The young woman on the other end of the line was actually nice, so I was compliant. She also mentioned something about calling me back about a gift. That's what tipped me off to something seeming fishy. But the strange thing here is that I got this call in Birmingham, AL. There's something odd about it all...

Yes i was getting this all call all the time, they didn't leave any messages and hanged up if you answered. Good news i put them on my call reject system i set with my computer, and now i don't half to hear them call in again and put up with there bull sh*t scams.Ex... Kill all 1-800 Numbers, spec numbers like (780) 510-2478, plus the messages to spec numbers to basically tell them to f**k off!Also this system works with unknown numbers like ex... my call blocker will tell the party to disable there call blocking feature. This is a loop hole for solicitors use to try *67.Remember when someone calls that you don't know, chances are they always want something from you.

Calls at least once a day. They almost never leave a message. The one message they did leave was a woman saying "This is harassment" as if she was describing what it was she was doing. Weird.

23 calls in two days from this outfit.

These jokers have been phoning our house every day for weeks now. They phone 5 or six times a day, every day including weekends - morning and afternoon, never leave messages and sometimes callback 3 times in the same hour.Strange that they identified themselves to an earlier poster as an Edmonton company, since we are in Edmonton and their number ID's as long distance??Answered it finally, someone VERY hard to understand said something about an environmental survey and proceeded to question about smokers in the house, allergies, pets - and then how long living in the house, followed by how many people are in the house and which are working out of the house during the day...That's when we told them no more answers and not to call back. Sounds like burglary recon considering how many times a day they phone, no proper caller ID, and the long distance number used for a local survey??Lucky for us the house is alarmed and we have dogs!