The "KeystoneState" ranks 48th in CO2 emissions from fossil fuel combustion, 49th for particulates in the air, and 49th for toxic exposure.
拱心石之州在化石燃料燃烧产生CO2上排名48,可吸入颗粒排名49,毒素暴露位居49。
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Pennsylvania's nickname is the keystoneState. Just as a keystone holds together a stone arch, Pennsylvania was seen as holding together the young American republic.
UGI Utilities, which serves Trimble and homes across the KeystoneState, saw a record of more than 5, 500 customers converting to gas in the year that ended in September.