@LauraBedrossian @luckytran @jonlevyBU The expectation of cleaner indoor air imposes costs on businesses, property owners, and governments.
It's no different from heavy industry minimizing clean air and water.
@LauraBedrossian @luckytran @jonlevyBU 对更清洁室内空气的期望会给企业、业主和政府带来成本。
这与重工业减少清洁空气和水没有什么不同。