CH 32 BIO

use of drip irrigation systems

habitat loss

Decreasing the amount of land that is altered in order to accommodate human desires (new homes, factories, agriculture, etc.).

use of aquaculture/aquafarming

loss of trees disrupts the carbon cycle, limiting the amount that is absorbed by plants, and increasing the concentration of carbon dioxide in the atmosphere.

true

contour with no-till farming

growing livestock.

no deforestation of nearby lands Of these choices, only sediment buildup is a problem that is contributed to by damming streams and rivers, although there are many other problems that can be created by dams. Sediment buildup can reduce the storage capacity of reservoirs.

fossil fuel usage, deforestation, and agriculture

chlorofluorocarbons (CFCs)

false

renewable energy sources

no two hundred hectares of wetlands in Canada that soak up pollutants and purify water......It is estimated that one hectare of wetlands in Canada act to take up pollutants as well as purify water. Each hectare is valued at $50,000. If the forest contains two hundred hectares this would equal approximately $10 billion dollars in value.

loss of biodiversity in fish and other species.

increasing use of extensive irrigation techniques to nurture demanding crops

salinization

True

an undesirable alteration to the environment.

Protecting biodiversity has decreased the amount of fresh water available to human populations because of the "sponge effect."

development of new sections in cities as older ones become dilapidated and unusable

Greenhouse gases prevent radiation of infrared energy back into space, trapping the heat near the Earth's surface and causing the climate to warm.

irrigating crops.

absorbing carbon dioxide.

false

important natural resources are being consumed more quickly than they can be replenished.

dumping of sewage from coastal cities into the ocean

Water levels below dams are reduced, and large dams disrupt upstream ecosystems.

true

It depletes fish that feed on some species and serve as food sources for other species, leading to the eradication of some species and the overpopulation of others.

true

overgrazing of livestock

more value can be derived from the more diverse products produced by ecosystems with high biodiversity relative to land that has been cleared for agriculture.

land subsidence including sinkhole formation

higher water bills because of the need to irrigate vegetation

soak up water from runoff and rainfall, releasing it at a regular rate that moderates flooding of streams and rivers.

false

Creating a law that bans the development and use of roads for snowmobiling and skiing in the lynx habitat.

methane and carbon dioxide

false

redesigning city developments to revitalize existing areas instead of developing new ones

biological magnification

true

loss of plant and animal life in an area.

Energy must be collected, converted into another form, and stored until needed.

no runoff of water leaves silt deposits behind, which reduce the ability of plants to grow. While extensive use of water from aquifers does create major problems, it is evaporation of water used in irrigation that can leave behind excess salts and minerals, which over time can reduce the fertility of the land. The use of drip irrigation systems, which reduce water usage, and only irrigating at night when less of the water evaporates can over time reduce costs, protect the fertility of the land, and conserve valuable water resources.

Leftover minerals from ores are left along a stream bed, allowing leftover traces of the mineral to run off into the stream after heavy rains.