Genetically modified crops and barrel: what they have in common

1. Step 1. Genetically modified crops — uses — Mineral fertilizer. Intensive farming combines varieties and fertilizers.
2. Step 2. Mineral fertilizer — uses — Sulfuric acid. Superphosphate is made with sulfuric acid.
3. Step 3. Sulfuric acid — is used in — Chemical plant. The first chemical plants produced sulfuric acid and soda.
4. Step 4. Chemical plant — is made of — Brick. The furnaces and towers are brick.
5. Step 5. Brick — is material for — Arch. Arches were built of brick or stone.
6. Step 6. Arch — works like — Barrel. Staves squeezed by hoops hold their shape by the same compression as the stones of an arch.

Open Evothings