Air emissions that are not released through stacks, vents, ducts, pipes, or any other confined air stream. These irregular, unintended gas releases result mainly from industrial activities. Fugitive emissions are gases or vapors that usually come from equipment leaks or evaporation from surface impoundments. Such emissions also contribute to air pollution and climate change. For instance, a Canadian inventory of greenhouse gases released from fuel activities for the year 2000 estimated that fugitive emissions had a “global warming potential equivalent to 17 million tons of carbon dioxide.”