| ▲ | KolibriFly 6 days ago | |
I've also seen studies where the toxicity per microgram varied hugely depending on whether the source was traffic, coal, or biomass burning | ||
| ▲ | pa7ch 5 days ago | parent [-] | |
Which source was worse? | ||
| ▲ | KolibriFly 6 days ago | |
I've also seen studies where the toxicity per microgram varied hugely depending on whether the source was traffic, coal, or biomass burning | ||
| ▲ | pa7ch 5 days ago | parent [-] | |
Which source was worse? | ||