How long ago was geenland green?

Answer 1

Greenland was once much greener than it is today, with evidence suggesting that during the warm periods of the early Holocene, around 10,000 to 5,000 years ago, it had a more temperate climate that supported vegetation and possibly even forests. This climate changed as the Earth entered a cooler phase, leading to the extensive glaciation that characterizes Greenland today. Thus, Greenland was significantly greener about 10,000 years ago.