Overslaan en naar de inhoud gaan

page search

Displaying 14617 - 14628 of 17903

Indigenous flora conservation in Kenya.

Journal Articles & Books
december, 1992
Kenya

This paper describes the environmental degradation that has occurred in Kenya since early this century, initially due to the introduction of plantation farming. Forests have been further targeted for farmland, fuel wood, building materials and hardwood species. Range land species have also become threatened due to continued infiltration of the population. The discussion considers the efforts of the Kenyan government to legislate and administrate against the further loss of natural resources and the consequent development of environmental awareness among the populace.

Spectral reflectance in the Tunesian desert

Reports & Research
december, 1992
Tunisia

.

Satellites provide the possibility to give a synoptical view of the earth surface at regular time intervals. Satellites operating in the optical wavelengths have however as disadvantage that monitoring of the surface characteristics becomes impossible as soon as clouds are present. Deserts and desert margins are for that reason much more appropriate for monitoring by optical satellites than temperate and wet tropical areas. Potential hazards, possibilities and often inaccessibility makes use of optical remote sensing very reasonable.

La silvicultura en zonas áridas

Journal Articles & Books
november, 1992
Sudan
Burkina Faso
Zimbabwe

Los tcnicos forestales y los administradores de recursos naturales entendieron muy poco y mal los mltiples usos que los campesinos hicieron de las formaciones forestales en el curso de los milenios, ampliamente documentados en un artculo sobre las tcnicas de ordenacin de tierras arboladas aparecido en el nmero 160 de Unasylva.

Agenda 21

Legislation & Policies
november, 1992
Global

Agenda 21 is a comprehensive plan of action to be taken globally, nationally and locally by organizations of the United Nations System, Governments, and Major Groups in every area in which human impacts on the environment.

Agenda 21, the Rio Declaration on Environment and Development, and the Statement of principles for the Sustainable Management of Forests were adopted by more than 178 Governments at the United Nations Conference on Environment and Development (UNCED) held in Rio de Janeiro, Brazil, 3 to 14 June 1992.