There are many difficult achievements in "Frost Age 2", and avoiding famine is one of them. To achieve this achievement, you only need to have no hunger in New London during the white snow, that is, the white curtain. This is more difficult because food storage is more troublesome.
How to get the Free from Famine achievement in Ice Age 2
Protection from famine
During the White Act, there was no starvation in New London.
Location: Story-Chapter 2 [obtained at the end of the white curtain]
Stock up on as much food as possible before then, using the same principles as in the prologue.
Use the following preparations to store food:
Laws under "Food Additives"
Colonies or resource points outside the city (Frostland)
Early research on greenhouses to increase food production
Establish a "food storage center" to expand storage
Make sure no one goes hungry during the albinism and you will receive the achievement.
To be sure, try to prepare enough food for at least 24 weeks.