Environmental and behavioral psychologist, Karine Lacroix PhD, discusses whether individual eco-friendly behaviors hinder systems-wide change. She explores spillover effects, measures behavior outcomes, and emphasizes normative goals like reducing meat consumption. The impact of meat consumption on the environment is highlighted, considering cultural reasons and preferences. Negative spill-over effects and self-efficacy are explored, along with communication strategies and framing environmental messages for motivation. Designing programs and systems to facilitate desired behaviors is discussed, focusing on context and social influences.