Nope! A 4 degrees average rise means massive chaos of climate ups and downs, no one is going to be happy with that. Also note that extreme North/South location

Nope! A 4 degrees average rise means massive chaos of climate ups and downs, no one is going to be happy with that. Also note that extreme North/South location do not get good sunshine for plant growth, it's too low on the horizon, even if the temperatures are balmy...