In an era marked by ecological degradation and growing injustice, the call to care for our common home has never been more urgent. Eco-theology brings together faith, ecological awareness and ethical reflection, offering a much-needed response to climate change. It invites us to re-imagine our relationship with one another and with the natural world by broadening the concept of solidarity into a way of life that connects ecological responsibility with the pursuit of social justice. Pope Francis' 2015 Encyclical Laudato Si' invites us to live in a spirit of solidarity that honours the interconnection of all creation. It calls us to listen attentively to the cry of the earth and the cry of the poor, encouraging us to view the planet as our common home, a shared space that is worthy of care and respect. This invitation goes beyond environmental concern, as it is relational. To care for the planet means to care for all that inhabit it because the wellbeing of creation is intrinsically linked to the wellbeing of others. This paper explores how eco-theology broadens the concept of solidarity, extending it beyond human communities to include all living beings and ecosystems. It demonstrates how faith-based responses can inspire hope, reduce inequality and promote justice. By integrating ecological responsibility with social equity, religion can foster a culture of responsibility that addresses environmental degradation and social injustice. Ultimately, caring for the planet and caring for one another are inseparable, and faith can guide us towards a just and sustainable future.