Carbon dioxide levels have risen above 400 parts-per-million, but geoengineering is no alternative to reducing emissions, writes Professor Steve Sherwood.
A carbon price of between $50 and $100 per tonne would make coal-fired and gas-fired power less economical than renewable electricity, a UNSW study shows.
Shallow coral reefs may be even more susceptible to increasing acidity caused by heightened levels of carbon dioxide in the atmosphere and oceans than previously recognised.
The only sure way to stop the buildup of greenhouse gases in the atmosphere is to curb carbon dioxide emissions, write Steve Sherwood and Laurie Menviel.
