Good water flow and a good place to gather food
Keeping Communism from spreading beyond the countries already under it's influence
Answer:
They affect weather and climate mostly through evapotranspiration and albedo. With vegetation covering about 20% of our planet, it's no surprise that plants affect climate. ... Plants process and release water vapor (necessary for cloud formation) and absorb and emit energy used to drive weather.
Because a pandemic(unlike and epidemic, which is more provincial) reaches around an entire nation and/or continent. Obviously, a nationwide sickness would be terrible for a newly developing nation trying to get on its feet for the first time. It’s just more unnecessary work for the new nation to deal with. Hope this helps!