Inclusion Criteria:  Age >= 18 years. Both men and women and members of all races and ethnic groups will be included Participants must have histologically or cytologically confirmed hormone receptor positive (HR+) HER2 negative (-) breast cancer or prostate cancer (hormone therapy excepted) who are in Stage I-III with no evidence of metastasis using the Cancer Therapy Evaluation Program (CTEP) Simplified Disease Classification Criteria for solid tumors: Participants must have measurable disease, defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded for non-nodal lesions and short axis for nodal lesions) as >= 20 mm with conventional techniques or as >= 10 mm with spiral computed tomography (CT) scan, magnetic resonance imaging (MRI), or calipers by clinical exam Participants must have no history of autoimmune disease Ability to understand and the willingness to sign a written informed consent document  Exclusion Criteria:  If they have asthma. Rationale: forest oils may be a possible trigger for asthma) If they have a known allergy to citrus peel or pine forests. Rationale: forest oils may cause contact dermatitis and coughing If they are unable to detect common odors from commercial fragrances. Rationale, forest oils are humidified as an aroma to be inhaled in the simulate the forest greenspace immersion (SFIT) If they have known metastases should be excluded from this clinical study. Rationale, because of their poor prognosis rather than being in early stages of cancer Febrile illness/infection within previous two weeks. Rationale, immune biomarkers will reflect previous febrile illness Current tobacco or tobacco use within 1 hour of start of SFIT. Rationale: forest oils may cause contact dermatitis and coughing Prior autoimmune disease, are on immune-modulating therapies (endocrine therapy allowed). Rationale, because of their poor prognosis rather than being in early stages of cancer Had surgery or invasive procedure in the past two months. Rationale, because of their poor prognosis rather than being in early stages of cancer Inability to complete study requisites