Second Nature is a climate and sustainability podcast that starts with everyday decisions and follows them outward. It is grounded in the small stuff. Composting ratios, slow-shopping lists, lawn alternatives, reusable bottles, and grocery waste become entry points into larger stories about soil, water, money, fuel, and community power. Caitlin Cunningham leads the show with a measured, service-minded style. She explains the problem first, then gives it texture through listener stories, expert answers, and practical examples. The show is especially attentive to the emotional fatigue of trying to make good choices inside systems built for convenience and extraction. It does not pretend a compost bucket can fix aviation emissions. It also does not dismiss the value of changing a household habit, joining a local network, or asking harder questions about where money goes. That balance gives the series its shape. Episodes often begin with a familiar scene, such as an airport water station, a neat green lawn, a shopping impulse, or water arriving invisibly through a city tap. From there, the show widens the lens. A lawn becomes a neighborhood ecosystem. A flight becomes a question about sustainable aviation fuel, feedstocks, and price gaps. A shopping delay becomes a way to talk about dopamine loops, secondhand goods, and gifts that prioritize experiences. A water episode becomes a story about distance, control, and the systems that separate city residents from the sources they depend on. Listener contributions keep the show from sounding abstract. People describe the habits that actually changed their kitchens, closets, gardens, budgets, and sense of responsibility. The show can be morally pointed, especially around greenwashing, waste, and climate obstruction, but its criticism usually lands beside a practical next step. It is also comfortable with wonder. Episodes about reciprocity, nature, plants, fungi, animals, and resilience give the series a softer register without losing its civic focus. Second Nature works best for listeners who want climate media that is neither doom-heavy nor lifestyle-polished. It treats sustainable living as a daily practice shaped by money, access, infrastructure, and collective action.