From 1973 to 1987 he directed the conservation program at World Wildlife Fund-U. S., and from 1987 to 1998 he served as Assistant Secretary for Environmental and External Affairs for the Smithsonian Institution in Washington, D. C., and in 1994 became Counselor to the Secretary for Biodiversity and Environmental Affairs.

From the conservation movement at the beginning of the 20th century, then with concern in the sixties about chemical pesticides, the ecological movement was born with Murray Bookchin's Our Synthetic Environment and Rachel Carson's Silent Spring.

From the conservation of momentum,

From this beginning, the overriding strategy and policy of the institution has been to explore and promote mutually beneficial conservation arrangements that suit those promoting development as well as assisting people and nations to better preserve their flora and fauna.

From the Middle Ages, the activities of maintenance and conservation were in the hands of a “ technical office ”, which was in charge of all such operations and oversaw the workers and their sites: the Opera, or fabbriceria or procuratoria.

From October 1 through June, fishermen harvest lobsters from the only lobster conservation area in the state of Maine.

From this principal, conservation biologists can trace communal resource based ethics throughout cultures as a solution to communal resource conflict.

From 1945 to 1951 he was governor of the state, and during his tenure, natural resources were protected and conservation programs were promoted.

From the late 1980s, a more aggressive approach to scrub management was adopted together with more active conservation management starting with the large scale annual events for schools and volunteers such as “ Purge the Pine ” and “ Free Christmas Tree ” events.

From 1988, a New York City-based architecture and engineering firm was responsible for the materials conservation of Fallingwater.

From the original equations as given above in vector and conservation form, the equations are written in a non-conservation form as:

From 1970s, the emphasis changed to techniques in captive breeding and conservation breeding programmes for zoological collection.

From 2008 the event was much changed with different routes and use of the moor itself to help bird conservation in the nesting season.

From 1997-2000 he was President of Sustainable Development International, a consulting firm specializing in conservation and international management.

From its inception, the SNWA has worked to acquire additional water resources, manage existing and future water resources, construct and operate regional water facilities and promote water conservation.

From the 1910s Pāpāwai fell into disrepair, and little was done until the 1960s when conservation work was carried out on the carved figures.

From 1998-2000, McKay represented the Federal Government as a board member on the Rouge Park Alliance, a group of government representatives and community leaders dedicated to the conservation, ecological protection, and enhancement of the Rouge River watershed and lakefront areas ( The former riding of Scarborough East bordered on the Rouge River area ).

From the 1940s to the end of his life, he was renowned for his championing of public lands and of conservation of natural resources, and for his pugnacious defense of civil liberties.

From the 1860s Hunter was interested in conservation of public open spaces, and worked with other pioneers in this field, including Octavia Hill and Hardwicke Rawnsley.

From these teaching positions, because of his continuous association with OTS, through his numerous publications and mostly from his exemplary dedication, Janzen has been in close contact and influenced the thinking and ideas of just about every researcher and student of tropical ecology and conservation in the western hemisphere during the last 40 years.

From 1907 to 1909, he served in Roosevelt's Cabinet as Secretary of the Interior, where he advocated for the conservation of natural resources.

From 1889 to 1902, an extensive programme of conservation was carried out on the bridge, this began with the prevention of the potential collapse of the tower by inserting metal rods to tie the two faces of the tower together, the four round plates of the at the ends of these two rods can still be seen.

From May 23 through September 2, 2006, the Ditty Bops embarked on a cross-country tour by bicycle to promote the release of their second album, Moon Over the Freeway, while advocating a call-to-action about pollution and energy conservation.

From 1 July 1998, Jandakot Airport Holdings purchased a 50-year lease with a 49-year option to operate and maintain the airport including its conservation areas.

From the other perspective, Alcott's unique teaching ideas created an environment which produced two famous daughters in different fields, in a time when women were not commonly encouraged to have independent careers.

From a modern perspective these figures may seem small, but in the world of Greek city-states Athens was huge: most of the thousand or so Greek cities could only muster 1000 – 1500 adult male citizens and Corinth, a major power, had at most 15, 000 but in some very seldom cases more.

From a subjective perspective, antipsychotics heavily influence one's perceptions of pleasurable sensations, causing a severe reduction in feelings of desire, motivation, pensive thought, and awe.

From a geostructural perspective the Azores is located above an active triple junction between three of the world's large tectonic plates ( the North American Plate, the Eurasian Plate and the African Plate ), a condition that has translated into the existence of many faults and fractures in this region of the Atlantic.

From a sociological and demographic perspective, the Big Brother franchise allows the opportunity for analysis of how people react when forced into close confinement with people who lie outside their comfort zone, since they may hold different opinions or ideals from other contestants, or simply belong to a different group of people than a contestant normally interacts with.

From an articulatory perspective this terminology is incorrect, as breathy voice is a different type of phonation from aspiration.

From one perspective, the copula always relates two things as subsets.

From a popular perspective, the term Chicano became widely visible outside of Chicano communities during the American civil rights movement.

From a geological perspective, it did not take long for mammals and birds to greatly diversify in the absence of the large reptiles that had dominated during the Mesozoic.

From the Orthodox perspective, Conservative Jews are considered just as Jewish as Orthodox Jews, but they are viewed as misguided, consistent violators of halakha.

From the time of Deng Xiaoping onwards, there has been a drift of focus towards a Marxist-inspired, moderated by Conficianism, nationalist perspective, and consideration of China's contemporary international status became of paramount importance in historical studies.

From this perspective, much literary critical theory, since it is focused on interpretation and explanation rather than on social transformation, would be regarded as positivistic or traditional rather than critical theory in the Kantian or Marxian sense.

From the perspective of the rotating frame, the additional force terms are experienced just like the real external forces and contribute to the apparent acceleration.

From the perspective of the developing world, the benefits of forest as carbon sinks or biodiversity reserves go primarily to richer developed nations and there is insufficient compensation for these services.

From this perspective, everyone speaks a dialect.

From a neurological perspective, different types of writing system, for example alphabetic as compared to logographic writing systems, require different neurological pathways in order to read, write and spell.

From a theoretical perspective, both tao and dao transliterations if pronounced according to English spelling conventions are equally close to, or far from, the Standard Chinese pronunciation of 道.

From another perspective, the farmer and the miller both reduce a risk and acquire a risk when they sign the futures contract: the farmer reduces the risk that the price of wheat will fall below the price specified in the contract and acquires the risk that the price of wheat will rise above the price specified in the contract ( thereby losing additional income that he could have earned ).

From a more advanced perspective, each of these definitions may be interpreted as giving the unique analytic continuation of e < sup > x </ sup > to the complex plane.

From a classical perspective, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner ; whereas from the perspective of quantum field theory, the field is seen as quantized, being composed of individual particles.

From the Eastern Orthodox perspective, a council is accepted as being ecumenical if it is accepted by the Eastern Orthodox church at large – clergy, monks and assembly of believers.

From an economic perspective environmental laws may be understood as concerned with the prevention of present and future externalities, and preservation of common resources from individual exhaustion.

From a more modern perspective, Haeckel's drawings were the beginnings of the field of evolutionary developmental biology ( evo-devo ).

From the 1960s to present day educational psychology has switched from a behaviorist perspective to a more cognitive based perspective because of the influence and development of cognitive psychology at this time.