Why were the railroad companies happy about the creation of the national parks?

interest in National Parks because they provided a new frontier to make money. ... Railroads had already provided the first access to many parks; the Great Northern to Glacier; the Northern Pacific to Yellowstone; the Union Pacific to Zion, Bryce, and the North Rim of Grand Canyon; and the Santa Fe to the South Rim.

Explanation:

there are treatment options for depression (mdd) that may work for you. one way of treating depression may be to affect the levels of certain chemicals that brain cells use to communicate, called neurotransmitters. scientists believe that certain neurotransmitters may be out of balance in depression.

although the exact way depression medications shown to ease overall depression symptoms in some people work is unknown, scientists think that some medications work by affecting the levels of a neurotransmitter called serotonin in the brain. other treatments work by affecting the levels of other neurotransmitters like norepinephrine or dopamine.

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