The understanding that some pesticides are more hazardous than others is well established. Recognition of this is reflected by the World Health Organization (WHO) Recommended Classification of Pesticides by Hazard, which was first published in 1975. The document classifies pesticides in one of five hazard classes according to their acute toxicity. In 2002, the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) was introduced, which in addition to acute toxicity also provides classification of chemicals according to their chronic health hazards and environmental hazards.

Cities of Tomorrow is a critical history of planning in theory and practice in the twentieth century, as well as of the social and economic problems and opportunities that gave rise to it. Trenchant, perceptive, global in coverage, this book is an unrivalled account of its crucial subject. The third edition of Cities of Tomorrow is comprehensively revised to take account of abundant new literature published since its original appearance, and to view the 1990s in historical perspective. This is the definitive edition, reviewing the development of the modern planning movement over the entire span of the twentieth century.

"With 80% of its population living in cities, Latin America and the Caribbean is the most urbanized region on the planet. Located here are some of the largest and bes-known cities, like Mexico City, São Paulo, Buenos Aires, Rio de Janeiro, Bogota, Lima and Santiago. The region also boasts hundreds of smaller cities that stand out because of their dynamism and creativity. This edition of State of Latin American and Caribbean cities presents teh current situation of the region's urban world, including the demographic, economic, social, environmental, urban and institutional conditions in which cities are developing." -- p.4 of cover.