Chapter 13 Human Impacts of the Environment

Human

________ wastes often contain infectious agents that cause waterborne diseases such as.

Soil

________ is constantly being formed by the physical and chemical decomposition of rock material and by the decay of organic matter.

Americans

________ produce garbage and other municipal waste at a rate of about 2 kilograms per person per day.

Air pollution

________ is the cause of the destruction of the Earths ozone layer.

drainage

Self- contained, self- regulating, and interacting communities adapted to local combinations of climate, topography, soil, and ________ conditions.

Human activities

________ have increased the concentrations of three greenhouse gases.

Spatial interaction

________ among regions did not halt the creation of distinctive regional subsystems of culture.

Humans

________ have significantly altered the chemical composition of the atmosphere.

Pollutants

________ come primarily from burning fossil fuels.

Water

________ plays a critical role in moderating the Earths climate.

Ozone problems

________ lead to greater exposure to UV radiation and it increases the incidence of skin cancer and, by suppressing bodily defense mechanisms, increases risk from a variety of infectious diseases.

Solid wastes

________ are generally landfills or incineration.

Human impact

________ on the environment has shifted scales from the local or regional to the continental and global scales.

radioactive wastes

10 percent of industrial waste materials are hazardous chemical or ________.

Humans

________ are negatively affecting the arid and semiarid regions of the world.

Air pollution

________ is a global problem today.

Humans

________ have transformed the Earths landscapes since the end of the last glaciation.