The United Nations estimates that the tropics currently accounts for 41% of the world's population and predicts that by 2050 approximately 55% of the world's population will live in the region (McNeil, 2009).
The people of the tropics face some of the most critical issues of our time, including the impact of climate change (rising sea levels, declining crop yields, extinction of vulnerable species); poor health outcomes (more than 1 billion people suffer from neglected tropical diseases, unacceptable levels of infant mortality and reduced life expectancy); extreme poverty; poor educational outcomes; environmental degradation; political and economic instability.
Source: Harding, S. (2011). The tropical agenda. Journal of Tropical Psychology, 1, 1, 2-5. URL: http://journals.cambridge.org/abstract_S1838990200000028