Emission intensity refers to the amount of greenhouse gases released into the atmosphere per unit of activity or output. There are a number of synonyms for this term that are commonly used in discussions of climate change and environmental policy. Some of these include carbon intensity, carbon footprint, emission rate, and carbon efficiency. These terms all refer to the same concept of measuring the environmental impact of human activities, such as industrial production, transportation, and agriculture. By developing more efficient and sustainable practices, businesses and communities can reduce their emission intensity and minimize their contribution to climate change.