AHM Zehadul Karim Is population growth risking our food security? In 1830, the world population was only 1 billion. It took 100 years for this number to double. 11 July 2020, 18:00 PM Is population growth risking our food security? In 1830, the world population was only 1 billion. It took 100 years for this number to double. 11 July 2020, 18:00 PM