Climate change is an emerging threat to global public health. It is also highly inequitable, as the greatest risks are to the poorest populations, who have contributed least to greenhouse gas emissions. The rapid economic development and the concurrent urbanization of poorer countries mean that developing-country cities will be both vulnerable to health hazards from climate change and, simultaneously, an increasing contributor to the problem.

Horses are inheritably couch potatoes. An overeating, slothful horse leads to an obese horse. Unlike humans, however, horse owners often don't see the dangers of an obese horse. Caretakers may see no harm in giving their horses rich foods, but obesity in horses is just as unhealthy as obesity in humans and can lead to fatal diseases.