The Little Green Data Book provides key environmental data for over 200 economies, based on the World Development Indicators 2015 and its online database. Over 50 indicators are used, organized into categories on: agriculture; forests and biodiversity; oceans; energy and emissions; water and sanitation; environment and health; and national accounting aggregates. Data is presented for the regions of East Asia and Pacific, Europe and Central Asia, Latin America and the Caribbean, Middle East and North Africa, South Asia, and Sub-Saharan Africa.
The 2015 edition uses two new air pollution indicators: mean annual exposure to suspended particulate matter less than 2.5 microns in diameter (PM2.5); and percentage of total population exposed to PM2.5 pollution above the World Health Organization (WHO) Air Quality Guidelines (AQG) value of an annual average of 10 microns per cubic meter. Previous editions used indicators focused on the larger particulates (PM10) and only on urban centers with more 100,000 persons.
Also incorporated this year, are estimates of the economic costs of air pollution, including household air pollution from cooking with solid fuels.