Personally, I think the folks at MIT tend to know an awful lot about things that the rest of us don’t. Could they simply be doing this to get grant money? Of course that’s possible, but MIT has a pretty good record of coming up with some excellent science and technology. I’m looking forward to what they find out. If they can reduce contrails and global warming at the same time, for no real added cost, why not? The added benefit of clearer blue skies on those clear blue sky days is a bonus.