Bibliography pp. 195-209.

Smallholder tree cultivation and management is a common form of land-use in high-potential areas of Kenya. Some practices, such as the planting of trees on field boundaries, are strongly embedded in customary notions of land and tree tenure. Others, such as the planting of black wattle (Acacia mearnsii) woodlots, are more recent innovations, introduced to produce commodities for domestic and export markets. This study explores the economic dimensions of tree growing in Kenya, using land-use studies and the results form a household survey in the upper coffee/lower tea zone of Murang'a District. The study showed that households which grow woodlots operate larger parcels, are headed by older persons, and have fewer resident and more non-resident members than other households. Logistic regression modeling explored causal relationships, suggesting woodlots are more likely to be established as households age and as family labor becomes scarce.

Humanity's ecological footprint is expanding at an alarming page. With climate change, increases in human population and consumption levels, and other anthropogenic factors, nearly half the known species on Earth could soon be gone. The near collapse of entire ecosystems has already occurred. We are facing a huge sustainability issue. This Encyclopedia, in 3 volumes, proposes a global synthesis detailing the world's imperiled species and ecosystems. It documents rarity and endangerment, the major drivers of loss, areas of conservation importance, and implementation strategies to save and restore imperiled species and ecosystems. It is a first of its kind coverage of Earth's imperiled species and ecosystems in one comprehensive encyclopedia. Comprehensive - First of its kind coverage of Earth's imperiled species and ecosystems in one source, including recommendations for sustainability and conservation Global appeal - Includes global and regional applications with an emphasis on the integration of biology, geography, and land-use Reader-friendly - Top notch scientific articles written in easy-to-understand language and including strong visual graphics

Extreme weather and climate events, interacting with exposed and vulnerable human and natural systems, can lead to disasters. This Special Report explores the social as well as physical dimensions of weather- and climate-related disasters, considering opportunities for managing risks at local to international scales. SREX was approved and accepted by the Intergovernmental Panel on Climate Change (IPCC) on 18 November 2011 in Kampala, Uganda.