Climate change, sometimes called global warming, is the gradual increase in Earth’s average surface temperature over time. This temperature increase is linked, at least in part, to human activity. An overwhelming scientific consensus believes that climate change is caused largely by human activity, which emits carbon dioxide and other natural greenhouse gases into the atmosphere. This increase in Earth’s temperature is a threat to world security because it can lead to droughts and climate-induced floods that can damage crops and infrastructure, as well as raising sea levels, disrupting animal migrations, and changing the dynamics of trade flows and air travel.
Several studies have shown that, for the last half century, Earth’s average surface temperature has been steadily increasing, with an accelerating rate during the past two decades. Studies have indicated that this increase in Earth’s temperature is linked, at least in part, to human activity. The increase in atmospheric concentrations of greenhouse gases responsible for climate change has also been linked to this climate change; the increased concentration of these gases in the Earth’s atmosphere is the result of the long-term buildup of organic carbon dioxide in the Earth’s atmosphere, from the burning of fossil fuels for energy and industrialization, or from the capture and storage of carbon dioxide in the Earth’s surface layers.
Because human activities are believed to be the primary cause of climate change, mitigation of these global warming processes requires reducing the Earth’s average temperature. Efforts to reduce greenhouse gas emissions have been concentrated on reducing Earth’s concentrations of these gases in the atmosphere, but very little effort has been made to reduce human activity. To cut greenhouse gas emissions, we need to drastically reduce the amount of carbon dioxide released into the atmosphere. Only then will we be able to prevent climate change and its devastating effects.