Answers DRHS GA-GSE Environmental ScienceHuman Events and the Environment

Sustainability Answers

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A local farmer began to follow a more sustainable practice. As a result, his levels of carbon emissions decreased by fifty percent. The soil quality will most likely

increase

decrease

stay the same

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Which of the following energy sources is expected to have the least growth in the next 20 years?

hydroelectricity

coal

natural gas

nonhydro renewables

How do conservation tillage practices lead to agricultural sustainability?

Conservation tillage practices reduce the amount of water required to grow crops.

Conservation tillage practices help reduce soil erosion and maintain soil nutrient levels.

Conservation tillage practices naturally protect crops from insect damage, reducing the need for pesticides.

Conservation tillage practices reduce the amount of energy needed to produce crops.

What is the current greatest threat to agricultural sustainability?

erosion

water pollution

air quality

all of the above

How can recycling materials lead to environmental sustainability?

Recycling materials helps decrease the amount of new materials taken from the environment.

Recycling materials helps increase the rate of carbon sequestration.

By recycling materials, the amount of biomass available for energy purposes is increased.

All of the above

Why are carbon dioxide concentrations expected to increase?

Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase.

Carbon dioxide concentrations are expected to increase, because of an increase in agriculture.

Carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use.

All of the above

More than 50% of ecosystems are currently being used unsustainably.

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