There is a high risk of dangerous climate change, especially from the point of view of poor coastal communities such as those in Bangladesh, and communities with tenuous food security.
The predicted temperature and carbon dioxide levels at which climate change becomes dangerous are not known precisely, but estimates have been increasing, at the same time as the trajectory of emissions is showing signs of worsening, rather than improving. A temperature rise of 2° C is a widely held target discussed at the United Nations Climate Change Conference (COP15)W in Copenhagen in 2009; however the targets set by attending nations, even if met, appear unlikely to keep below this threshold.