CK12 Earth Science

the century. The total added will be about 2.5 billion people, which is more than were even in existence as recently as 1950. Wi ...

Figure 18.23: Rows of a single crop and heavy machinery are normal sights for modern day farms. ( 15 ) a single farmer produced ...

Humans and the Environment Along with the increases in food that have come from the Green Revolution have come enormous impacts ...

Figure 18.24: Pesticides are hazardous in large quantities and some are toxic in small quan- tities. ( 1 ) ...

Figure 18.25: The percentage of people in the world that live in abject poverty is decreasing somewhat globally, but increasing ...

Figure 18.26: An Australian Brown Tree Snake perched on a post in Guam. ( 2 ) and many in developing nations are already dammed. ...

Science can be an important part of sustainable development. When scientists understand how Earth’s natural systems work, they c ...

tion? How does an increase in the standard of living for people living in poverty affect the planet? What evidence is there tha ...

Image Sources (1) USDA. http://en.wikipedia.org/wiki/File:Cropduster_spraying_pesticides.jpg. Public Domain. (2) http://en.wikip ...

(19) Deer are herbivores.. GNU-FDL. (20). (21) Jami Dwyer.http://en.wikipedia.org/wiki/File:Lacanja_burn.JPG. Public Domain. (22 ...

Chapter 19 Human Actions and the Land 19.1 Loss of Soils. Lesson Objectives Explain how human actions accelerate soil erosion. ...

Figure 19.1: Soil loss from the dust storms of 1934 and 1935 came mostly from the states shown here in green in the Central Unit ...

resource that we need to grow food. Several factors contributed to the Dust Bowl storms. First, farmers in the Central United St ...

Figure 19.3: The bare areas of farmland are especially vulnerable to erosion. ( 12 ) ...

causes of excessive soil erosion. It is most commonly practiced in developing countries in tropical areas of the world, as peopl ...

Figure 19.5: Logging exposes large areas of land to erosion. ( 9 ) Figure 19.6: This large coal mining pit in Germany, and other ...

water run through them into the ground because they are hard andimpermeable(Figure 19.7). Since the water cannot enter the groun ...

and burn agriculture because it quickly gives them land to grow food crops on. Poverty is a big contributing factor to environme ...

Table 19.1: (continued) Source of Erosion Strategies for Prevention Grazing Animals Move animals throughout the year, so they d ...

Table 19.1: (continued) Source of Erosion Strategies for Prevention Building Construction Avoid building on steep hills Grade s ...