Nitrous oxide from aquaculture

摘要

The farming of fish and shellfish under controlled conditions - collectively known as aquaculture - is a significant component of global food production. In 2006 aquaculture supplied an unprecedented 47% of the total food fish harvest'. The aquaculture industry has grown at a rate of 8.7% per year since 1970, due to a rapidly expanding global demand for fish, particularly from China. Given that wild fish stocks are close to their maximum exploitable levels, there are strong economic and demographic incentives for this trend to continue. Here we argue that aquaculture may become an important source of nitrous oxide (N20) - a potent greenhouse gas and the dominant source of ozone-depleting substances in the stratosphere'''.