Yes we do need to feel scared as I feel it is already too late.
I saw a documentary a few years ago on the use of fossil fuels and how they are killing our planet - oceans included.
The research showed that it would be possible to try and reverse things if the mining stopped immediately - as I said this was aa few years ago, and if not stopped, the result would be a ripple effect of death on the planet.
We can all do our bit, but I am afraid that when it comes to big money driven companies, it is much to late.