 Hello and welcome to this course on Hydrogen Energy, myself Pratibha Sharma, I am Professor in Department of Energy Science and Engineering at IIT Bombay. This course is intended to offer for UG, PG, PhD students, faculty from various institutions, industry people who want to learn about the different aspects of hydrogen energy, who want to work in the area of hydrogen energy. This is a multidisciplinary course, just to give a brief background, a hydrogen is receiving an unprecedented interest and momentum globally. Several countries, they have come up with their own strategies, roadmaps, mission documents, pledges and various targets and incentives, so as to increase the deployment of hydrogen. Now, this is nothing new, hydrogen has seen some spikes of interest in the past. However, the difference this time is the depth of opportunities and possibilities have been identified, which hydrogen can offer, it can offer to decarbonize the various sectors, it can provide a clean, secure and sustainable energy future. Hydrogen is an energy carrier, like electricity. However, the major difference is the energy is in the form of a chemical energy. And as such, we have a lot of flexibility to produce it from various sources, to store it, to transport it. In this course, we are going to learn the different aspects of the hydrogen energy value chain. We will see the different methods of hydrogen production from fossil fuels, from renewables. We will go in much more detail on the industrial scale hydrogen production methods. However, we will also learn the methods, which are still at laboratory scale or certain prototypes have been demonstrated. We will study the different ways in which we can store hydrogen in compressed liquid or solid state form. We will see how we can transport it from the point of production to the point of utilization through pipelines, through super insulated vessels or tube trailers. We will also see the utilization of hydrogen using different energy conversion devices, fuel cells, IC engines. We will see the sensing and safety aspects, how we can sense what are the safety standards, protocols existing globally about the refueling stations. And we will see economics of all the materials and systems, processes involved in the entire hydrogen energy value chain. I hope you will have a great learning experience and you will thoroughly enjoy this course. Thank you.