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​Food processing is the transformation of agricultural products into food, or of one form of food into other forms. Food processing includes many forms of processing foods, from grinding grain to make raw flour to home cooking to complex industrial methods used to make convenience foods.

Primary food processing is necessary to make most foods edible, and secondary food processing turns the ingredients into familiar foods, such as bread.

Tertiary food processing has been criticized for promoting overnutrition and obesity, containing too much sugar and salt, too little fiber, and otherwise being unhealthful in respect to dietary needs of humans and farm animals.

Grantham (/ˈɡrænθəm/ GRAN-thəm) is a market and industrial town in the South Kesteven district of Lincolnshire, England. It straddles the London–Edinburgh East Coast Main Line and the River Witham and is bounded to the west by the A1 north–south trunk road. It lies about 23 miles (37 kilometres) south of the county town, Lincoln, and 22 miles (35 kilometres) east of Nottingham. The population in 2016 was put at 44,580.[1] Grantham is known as the birthplace of former UK Prime Minister Margaret Thatcher, for educating Isaac Newton at the King's School, as the workplace of the UK's first female police officer, Edith Smith in 1914, and for making the UK's first running diesel engine in 1892 and tractor in 1896. Thomas Paine worked there as an excise officer in the 1790s.