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By now, you probably know that spending time in nature — hiking through a forest, walking through a park, even hanging out on a beach — is good for your health. There has been many a study on how outside time can lower a person’s risk for developing things like Type 2 diabetes and cardiovascular disease, and can alleviate symptoms of some mood and mental disorders.

Now, researchers have begun to quantify how much time you’d need to spend in nature t