Science & Nature > Earth Science

Before history began, the Earth was being shaped by volcanic and seismic forces. Earth had a climate warmed by solar radiation and volcanic emission of greenhouse gases (carbon dioxide and methane) that kept the Earth warm. The Earth also had intermittent ice ages caused by decreases in greenhouse gases. Our species has existed for only a short time within the last ice age, but we are rapidly warming the Earth with emissions of waste greenhouse gases that will recreate greenhouse conditions that endanger the survival of human beings. Denial of these facts by a vocal minority is delaying the action necessary to prevent this potential catastrophe. Our power lies in the choices we mak ...