Terms : Hide Images
| 7595417 | agriculture | the practice of farming | |
| 7595418 | monoculture | farming strategy in which large fields are planted with a single crop, year after year | |
| 7595419 | green revolution | development of highly productive crop strains and use of modern agricultural techniques to increase yields of food crops | |
| 7595420 | renewable resource | resource that can regenerate quickly and is replaceable | |
| 7595421 | nonrenewable resource | resource that cannot be replenished by natural processes | |
| 7595422 | sustainable development | using natural resources at a rate that does not deplete them | |
| 7595423 | soil erosion | wearing away of surface soil by water and wind | |
| 7595424 | desertification | in areas with dry climates, process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert | |
| 7595425 | deforestation | destruction of forests | |
| 7595426 | aquaculture | raising aquatic organisms for human consumption | |
| 7595427 | smog | mixture that occurs as a gray-brown haze in the atmosphere | |
| 7595428 | pollutant | harmful material that can enter the biosphere through the land, air, or water | |
| 7595429 | acid rain | rain containig nitric and sulphuric acids | |
| 7595430 | biodiversity | sum total of all the organisms in the biosphere | |
| 7595431 | ecosystem diversity | variety of habitats, living communities, and ecological processes in the living world | |
| 7595432 | species diversity | number of different species in the biosphere | |
| 7595433 | genetic diversity | sum total of all the different forms of genetic information carried by all organisms living on Earth today | |
| 7595434 | extinction | disappearance of a species from all parts of its geographic range | |
| 7595435 | endangered species | species whose population size is rapidly declining and will become extinct if the trend continues | |
| 7595436 | habitat fragmentation | splitting of ecosystems into small fragments | |
| 7595437 | biological magnification | increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web | |
| 7595438 | invasive species | plants and animals that have migrated to places where they are not native | |
| 7595439 | conservation | wise management of natural resources, including the preservation of habitats and wildlife | |
| 7595440 | ozone layer | atmospheric layer in which ozone gas is relatively concentrated | |
| 7595441 | global warming | increase in the average temperatures on Earth |
