Environmental Science
The slow rate of decomposition of fallen logs in nature is due to their

poor nitrogen content
low moisture content
anaerobic environment around them
low cellulose content

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Environmental Science
The north-facing side of a hill in a mountainous region in the US tends to:

Grow a variety of trees that are typically observed at higher elevation
All of these
Receive less sunlight during a year than the south-facing side
Have snow on the ground for a longer period of time in winter compared to the south-facing side
Be a better location for a ski run than the south-facing side

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