The global population of farm animals increased 23 per cent between 1980 and 2010, from 3.5 billion to 4.3 billion, according to research by the Worldwatch Institute for its Vital Signs Online publication. These figures continue a trend of rising farm animal populations, with harmful effects on the environment, public health, and global development. Both production and consumption of animal products are increasingly concentrated in developing countries. In contrast, due in part to a growing awareness of the health consequences of high meat consumption, the appetite for animal products is stagnating or declining in many industrial countries.