A new study, the third of its kind in the past year, confirms that sea levels are rising, and rising at a rate that is increasing with time, according to a report published in Nature Climate Change. In 1993, a rate of 2.2 millimetre per year was reported; and based on changes in the mass of the Greenland and Antarctic ice sheets — the two largest sources of land-based ice on the planet — a sea level rise of 3.3 millimetre per year was reported in 2014. Previously, the dominant component of sea level rise was the expansion of ocean water as it heats up, the new study, however, has found that melting, from Greenland in particular, is now becoming a bigger contributor to sea level rise than thermal expansion. To find out more go to The increasing rate of global mean sea-level rise during 1993–2014.