Then theres the issue of sea level change. Global warming and climate change are usually thought to mean that world sea levels will rise, perhaps disastrously. But according to US government scientific experts, in recent times (2010 and 2011, to be precise) phenomena driven by human carbon emissions have actually caused world sea levels to fall. According to a statement issued by the US National Science Foundation: For an 18-month period beginning in 2010, the oceans mysteriously dropped by about seven millimeters. (3)