There is an ever increasing urgency to reduce manmade impact on the atmosphere. This involves developing methods of reducing the global emission of greenhouse gases, principally CO₂ and CH₄, as well as harmful combustion by-products. Just as important, this effort requires the tools to measure efficacy and compliance at carbon sources and sinks as well as to monitor pollution levels at remote locations. Picarro WS-CRDS trace gas analyzers represent the forefront of monitoring technology. These rugged compact instruments provide the ideal combination of accuracy, precision and long-term un-manned operation while being insensitive to contaminants and changing environmental conditions.