Earth’s climate has oscillated between greenhouse(warm)and icehouse(cold)modes throughout Earth history.At present,Earth is in the midst of an icehouse climate interval,despite the anthropogenic contribution to global warming and sea-level rise Earth’s climate has oscillated between greenhouse (warm) and icehouse (cold) modes throughout Earth history. At present, Earth is in the midst of an icehouse climate interval, despite the anthropogenic contribution to global warming and sea-level rise