Technological, scientific, and economic developments in the 20th century have resulted in all of the following EXCEPT more farmland being cultivated by fewer people.
increased costs for running commercial farms.
the elimination of most environmental threats.
greater scientific research on agriculture.
the use of satellite images to monitor crops.

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist

Select the correct answer.look at this nineteenth-century illustration of london. which explanation best relates this illustration to changes in britain in the 1800s? a.factory workers in cities lost their livelihood because of the lack of housingb.industrialization narrowed the inccome gap between landowners and workers.c.the migration of workers from rural to urban areas resulted in overcrowded citiesd.the spread of railways allowed farmers to sell produce far from where it was grown.