In addition to the direct effects of climate change induced sea level rise, it is important to be aware of the effect of salt infiltration on farming. Much of the world’s cropland is near the coast and at low altitude. It is therefore vulnerable to being rendered infertile by salt from the oceans, as increased sea levels produce brackish rivers and more extreme storm surges. Many of these croplands are in developing countries, where the compounded effects of climate change are most likely to overwhelm domestic adaptation capacity.
Scientists have predicted that a 90cm increase in sea level would cause major infiltration problems in Bangladesh. Most recent scientific evidence suggests a sea level rise of about 1m by 2100, and possibly significantly more.