Human behaviour and lifestyle leaves long-term cumulative influences on sustainability of ecological systems. Climate change has primarily become a concern of psychological and behavioural sciences because of the way people have contributed to climate change through their unsustainable behavioural practices. Therefore, climate crisis across the globe cannot just be limited to explore climate ... [Show full abstract] solutions at the levels of corporate bodies and governance systems. Besides, there has been overwhelming importance to technological solutions for climate/sustainability promotion while paying considerably limited attention to pro-climate behavioural transformation. Behaviour-centric solutions pertaining to climate change as well as sustainability, at the level of individual, family, and community, are the starting points for any behavioural transformation to take place. The chapter focuses on the need for systematic behavioural interventions for implementing climate change/sustainability solutions. Multidisciplinary approaches integrating natural and social sciences are warranted in this regard, to give policymakers, an insight into the various behavioural challenges and barriers in order to fortify policies for climate change and sustainability.