研究人员认为，科罗拉多北部前线附近的油气设施附近的居民可能接触到有害的空气污染物，包括苯等致癌物质，这些污染物可能高于美国环境保护署可接受的健康风险水平。

Those living near oil and gas facilities may be at higher risk of disease

https://www.sciencedaily.com/releases/2018/04/180409103920.htm

1. Lisa M. McKenzie, Benjamin Blair, John Hughes, William B. Allshouse, Nicola J. Blake, Detlev Helmig, Pam Milmoe, Hannah Halliday, Donald R. Blake, John L. Adgate. Ambient Nonmethane Hydrocarbon Levels Along Colorado’s Northern Front Range: Acute and Chronic Health Risks. Environmental Science & Technology, 2018; DOI: 10.1021/acs.est.7b05983

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每周2小时的志愿服务可减少丧偶老年人的孤独感

根据最近的一项研究，丧偶的老年人通过每年100小时参与自愿者服务，也就是每周大约两个小时，可以通减少配偶的死亡而导致的孤独感。

Volunteering 2 hours per week reduces loneliness in widowed older adults

https://www.sciencedaily.com/releases/2018/04/180416185559.htm

1. Dawn C Carr, Ben Lennox Kail, Christina Matz-Costa, Yochai Z Shavit. Does Becoming A Volunteer Attenuate Loneliness Among Recently Widowed Older Adults?The Journals of Gerontology: Series B, 2018; 73 (3): 501 DOI: 10.1093/geronb/gbx092