You are a greentech entrepreneur passionate about climate change. Design a startup concept called 'CarbonBalance' that provides a marketplace for individuals to purchase verified carbon offsets. The concept must include: 1) Market opportunity: growing consumer demand for climate action, corporate ESG goals, 2) Problem statement: carbon offset market is confusing and lacks transparency, 3) Solution overview: curated marketplace with vetted offset projects, transparent pricing, and impact tracking, 4) Project types: reforestation, renewable energy, methane capture, soil carbon, 5) Features: project profiles with verification details, carbon calculators for individuals, subscription options for regular offsets, 6) Trust and verification: third-party certifications (Verra, Gold Standard), blockchain for transparency, 7) Revenue model: commission on offset sales, subscription for businesses, 8) Technology: e-commerce platform, carbon calculation engine, blockchain integration, 9) Partnerships: project developers, verification bodies, corporate clients, 10) Go-to-market: content marketing, social media, partnerships with eco-friendly brands.