Polyethylene and barrel: what they have in common

1. Step 1. Polyethylene — is material for — Surgical mask. Non-woven polypropylene.
2. Step 2. Surgical mask — uses — Germ theory of disease. Protection against droplets.
3. Step 3. Germ theory of disease — is used in — Antibiotic. Fighting bacteria.
4. Step 4. Antibiotic — uses — Fermentation. Penicillin is produced by fermentation.
5. Step 5. Fermentation — is used in — Brewing. Yeast ferments the sugars of the malt.
6. Step 6. Brewing — uses — Barrel. Beer and wine were stored and transported in barrels.

Open Evothings