Some may have symptoms that haven't produced damage yet, and in some cases, the damage in the esophagus may have been healed by the acid-blocking medication, but still, the heartburn pain persists.

WSJ: Why Your Heartburn Drugs Don't Work

While the beans are still green, the chlorogenic acid remains intact.

NEWYORKER: The Operator

Most of today's modern candles are made by machines that pour paraffin and stearic acid into molds, although handmade candles are still popular.

FORBES: No. 14 The Candle

Embrapa also created varieties of soya that are more tolerant than usual of acid soils (even after the vast application of lime, the cerrado is still somewhat acidic).

ECONOMIST: Brazilian agriculture

The problem remains, though, that while the technology is able to cut carbon dioxide emissions, it may still increase another one: nitrogen oxide, tied to smog and acid rain.

FORBES: Recycling Wasted Heat and Power Could Clear the Air

One of the acid attack victims featured in the documentary did not want to speak on the record as she still lives with the husband who carried out the crime.

BBC: Pakistan's Oscar triumph for acid attack film Saving Face