Save the letter 'H'

I've been reading in my linguistics textbook that the sound 'h' is an endangered sound in English. More and more people are electing not to say it. Damn that Cockney English. If 'h' goes it could start a domino effect and take out 'i,j,k,l,m,n,o,p' too (note: this is just my personal opinion, don't think so poorly of my current educational institution). Let's all take pride in our phonemic library and make a nice breathy 'h'.