We should go back to oil lamps and farm whales just like we do with other livestock...its ok if they are killed nicely.
If the coral worries anyone research coral atol formation and you notice coral can manage sea level changes very well. To suggest the barrier reef will die denies reality.
Species extinction is inevitable unfortunately. It is accepted history and science that about 99.% of species are gone extinction is the rule and evolution the exception that enables some to survive.Any species that has made it to today is an exception.
It is nice some folk can feel guilt for human impact but sad others exploit such feelings of guilt simply for profit and power with "chicken little" stratagies.
Of more immediate concern. ...well make a list.
Many take the role of the fox and irrespective of the sky falling or not will dine well when all the chickens are sheltering in the chook house.
Just be happy knowing that not only will each of us die but in time our species will disappear and have no influence on the planet.
Finding a better energy source is needed because neither coal or NP are acceptable in the short long term.