The Sahara desert used to be a rainforest.
It can be really hard to picture the Great Sphinx of Giza in a green paradise. But if the environment of the Sahara Desert hadn’t changed, that might have been the reality. According to scientists, this enormous desert used to be a rainforest that was home to incredible animals like hippos. The abrupt switch in the ecosystem was caused by the Earth’s changing orbital rotation. Research has stated that having a very green Sahara Desert could happen again in the future.
....and what do you mean that the climate might change back... without Greenpeace's murderous terrorists.
in the case of the sphinx its already manmade climatechange.
look at the history of the nile and the niledelta