We use about 38 percent of Earth's land surface for agriculture.
Because only 3 percent of the liquid water on Earth is use-able for drinking and agriculture. The rest of it is salt water which can not be used for either.
Often the very same way you would use electricity.
Shading is used to give objects a sense of form on a flat surface.
limestone is not used in Columbia because crevices are present on its surface, while sand stone has porous surface which readily absorbs pollutants.
power generation, irrigation, travel, and recreation
Approximately 11% of the Earth's surface is suitable for growing crops. This usable land is primarily found in regions with favorable climates, soil conditions, and access to water for irrigation.
a map
2
The Equator
The Equator
That would be a physical map.
symbols
Yes it is.
Since agriculture is a big part here in Australia, in school we learned that 17.2% of people work in agriculture.
They are used to locate a certain place on a map.
Bedrock
Horizontal