A high-quality air purifier should have a HEPA (high-efficiency particulate air) filter.

Source: https://www.lacombeexpress.com/news/worried-about-air-quality-impact-on-asthma-other-conditions-heres-what-you-can-do/

California has awarded the wholesaler San Diego County Water Authority $3 million to help financially strapped households install high-efficiency toilets and upgrade irrigation systems, state officials announced last week.

Source: https://www.sandiegouniontribune.com/news/environment/story/2023-02-05/san-diego-secures-3-million-for-drought-relief-programs

The $25.9 million building will also have “green” design elements, including extensive use of natural light and high-efficiency fixtures.

Source: https://www.sandiegouniontribune.com/north-county-community-news/story/2023-03-05/north-county-school-news-march-5-super-stem-saturday-at-cal-state-san-marcos-forums-survey-for-san-dieguito

The A17 Pro has a six-core CPU that’s made up of two high-performance cores and four high-efficiency cores, plus Apple’s 16-core Neural Engine and a new six-core GPU.

Source: https://www.digitaltrends.com/mobile/iphone-15-pro-vs-iphone-15-pro-max/

These high-efficiency purifiers are capable of washing out particles as small as PM1 from the air, meaning they filter out diesel exhaust and COVID-19.

Source: https://www.theage.com.au/national/victoria/the-breathtaking-state-of-truck-pollution-in-melbourne-s-west-20230128-p5cg4z.html?ref=rss&utm_medium=rss&utm_source=rss_national