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changes in GHG concentrations. Lesser fluctuations come from decade-long swings in solar radiation.
Antarctic ice cores show that long periods of cooling and heating correlate closely with changing atmospheric concentrations of C02, historically between 180 and 290 parts per million (ppm). Sea levels have varied by 300 feet, depending on how much water is locked up in ice caps or melted from them. GHGs, climate and sea level are interconnected.
Since the last ice age ended 10,000 years ago, Earth has enjoyed a “long summer,” with atmospheric C02 concentrations around 280 ppm. With the resulting favorable climate, humans left their caves and gradually developed the civilization we now enjoy. But industrial society needed energy - first from burning wood, then coal, oil
90.7%