b*****d
发帖数: 61690 | 1 Wildfires in Northern California are giving San Francisco the worst air
quality in the world.
The figures come from AirVisual, which found that the Air Quality Index (AQI
) in San Francisco was 357 as of Friday afternoon. The city with the second
worst AQI is Dhaka, Bangladesh, at 284.
AQI is measured based on five different air pollutants and is calculated by
the Environmental Protection Agency. | a********r
发帖数: 4013 | 2 叔先见之明，北边一起火，就把可以虑PM2.5的滤网换装暖气，并启用备用的空气净化器 | G*********n
发帖数: 1 | 3
化器
简易便宜空气过滤，赶快做，加州烟雾致癌的
Compared with the expensive air purifiers on the market, these DIY air
purifiers are equivalent but at a much cheaper price.
For more details check out here
http://geniusasian.com/easiest-air-purifier/
https://youtu.be/aVQ_mMCai7c
只要filter 一样，就是等效的。
【在 a********r 的大作中提到】
: 叔先见之明，北边一起火，就把可以虑PM2.5的滤网换装暖气，并启用备用的空气净化器
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