Transport emissions are a major contributor to climate change and are expected to account for 60% of the increase in global greenhouse gas emissions by 2025. Switching to cleaner fuels like auto LPG is a viable option to reduce emissions. An onboard electronic monitoring system can accurately measure vehicle fuel consumption and emissions. This can help establish the first transportation emissions baseline for a city, which is needed to develop carbon offset programs but has not yet been done by any country. In 2008, the city of Kolkata, India started the process of establishing the world's first transportation emissions baseline using an electronic monitoring system on vehicles.