Mass extinction forecast with 6C temperature rise

Dwarfism is again expected to be a successful strategy for the survivors, enabling humans, animals and insects to mature earlier with less food and so reproduce before they starve. The researchers’ findings show that earlier optimism that increased carbon dioxide in the atmosphere would have a fertilization effect, allowing food plants to grow quicker in a warmer world, is more than countered by a loss in nutrition. For an overcrowded world this could be disastrous.

http://www.climatenewsnetwork.net/2013/01/mass-extinction-forecast-with-6c-temperature-rise/