natural seeding
61Carbon sink — A carbon sink is reservoir of carbon that accumulates and stores carbon for an indefinite period. The main natural sinks are: # Absorption of carbon dioxide by the oceans # Photosynthesis by plants and algae The process by which carbon sinks… …
62Fire ecology — The Old Fire burning in the San Bernardino Mountains (image taken from the International Space Station) Fire ecology is concerned with the processes linking the natural incidence of fire in an ecosystem and the ecological effects of this fire.… …
63Sustainability/Old — Sustainability is a characteristic of a process or state that can be maintained at a certain level indefinitely. The term, in its environmental usage, refers to the potential longevity of vital human ecological support systems, such as the planet …
64grassland — /gras land , grahs /, n. 1. an area, as a prairie, in which the natural vegetation consists largely of perennial grasses, characteristic of subhumid and semiarid climates. 2. land with grass growing on it, esp. farmland used for grazing or… …
65Zeolite — Zeolites (Greek, zein , to boil ; lithos , a stone ) are hydrated aluminosilicate minerals and have a micro porous structure. The term was originally coined in the 18th century by a Swedish mineralogist named Axel Fredrik Cronstedt who observed,… …
66climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …
67Israel — /iz ree euhl, ray /, n. 1. a republic in SW Asia, on the Mediterranean: formed as a Jewish state May 1948. 5,534,672; 7984 sq. mi. (20,679 sq. km). Cap.: Jerusalem. 2. the people traditionally descended from Jacob; the Hebrew or Jewish people. 3 …
68Drexel University — seal Motto Scientiae, Industria, Arte Motto in English Science, Industry, Art Established 1891 Type …
69Organic farming — Agriculture General …
70calendar — calendrical /keuh len dri keuhl/, calendric, calendarial /kal euhn dair ee euhl/, calendarian, calendaric, adj. /kal euhn deuhr/, n. 1. a table or register with the days of each month and week in a year: He marked the date on his calendar. 2. any …
