<h1>Environmental awareness shapes sustainable consumer choices; policies must target income, education and access to green options.</h1> Income, education and environmental awareness are identified as key predictors of individual sustainable consumer behaviour, with higher incomes improving access to sustainable products and education producing notable behavioural change among lower income individuals. Machine learning models and SHAP explanations mapped individual patterns, while sensitivity testing and Monte Carlo simulations supported robustness. The study links brand loyalty and review engagement to sustainable decisions and recommends policy measures-subsidies, targeted sustainability marketing, and integration of socio economic patterns into urban planning-to make environment efficient solutions practical and inclusive.