Human Events and the Environment Answers

How can the practice of tillage be harmful to the overall environment?a.It can impact waterways through sedimentation and pollution.b.It is harmful to the soil that is tilled.c.Tillage decreases overall crop productivity.d.All of the above

How is the environment affected by a large-scale oil spill?a.Large-scale oil spills are the largest contributor to air pollution.b.Large-scale oil spills lead directly to wetlands becoming deserts.c.Large-scale oil spills are damaging to water quality, aquatic life, and bird populations.d.Large-scale oil spills can lead to an increase in sea levels through glacial melting.

Large-scale fires can lead to a decrease in atmospheric carbon dioxide.

How can global warming lead to changes to the Earth’s surface?a.Global warming can lead to an increased number of earthquakes, which change the Earth’s surface.b.Global warming can lead to glaciers melting, causing flooding to areas and the decrease of glacial land masses.c.Global warming leads to a decrease in water levels of coastal wetlands.d.Global warming cannot lead to changes to the Earth’s surface.

Which choice is an example of an effect of agricultural techniques on the environment?

What sometimes occurs when reclaimed water is used in agriculture?a.crop deathb.overtillagec.pharmaceutical accumulationd.increased land use

Environmental catastrophes can cause changes to the Earth’s surface.

Dryland planting can benefit the environment by reducing the need for tillage.

Sedimentation increases with an increase in land used for agriculture.

Dead zones in waterways can occur as the result of fertilizer runoff.