The International Ecotourism Society (TIES) and Sustainable Travel International (STI) are two organizations that promote ecotourism and sustainable tourism. TIES defines ecotourism as responsible travel that conserves the environment and improves livelihoods. It creates an international network and educates tourists about ecotourism principles like minimizing environmental impacts. STI is a global leader in sustainable tourism that provides certification, carbon management, and education programs to help destinations and businesses incorporate sustainability. Both organizations aim to unite environmental conservation and local community benefit through responsible travel practices.