Let me clarify a couple of things.
Up to about 800 kilometres, the gravity of the situation self-cleans. Space is quite clean up to about 800 kilometres.
For example, on my space walk I dropped a bolt, just a tiny bolt. It was an embarrassing thing to do, but it happens. There was lots of media attention about how I was contributing to the junk in space and so on. The truth is that the bolt burns up in the atmosphere four days later, so we're not talking about junk in low Earth orbit; we're talking about the positions of our geosynchronous satellites, meaning all the Anik series that Canada has and all the other satellites that Telesat has. Once their lifetime is over, which is anywhere from 15 to 30 years, they'll stay up there a long time.
There is a recognition that we cannot do that anymore. We have to have a way to bring those satellites down and allow them to burn up in the atmosphere as well when their lifetimes are over.