A “green economy,” according to the United Nations Environment Programme, is an economy that promotes human well-being and social equity while reducing environmental risks and resource depletion. The three main pillars of a green economy are low-carbon development, resource efficiency, and social inclusion. The United States and Armenia, countries of different sizes and economic capabilities, are both taking steps towards sustainable development and a green economy. The country is developing solar energy, electric vehicles, air quality control, and efficient waste management. Armenia, although smaller and resource limited, is actively involved in the development of solar energy, attracting international support, and stabilizing agriculture. The Armenian Masrik-1 solar power plant is an important step towards energy independence. Both countries have air pollution problems that require strict control and an increase in green spaces to solve them. Effective waste management and the development of recycling systems are vital for both. Overall, both the United States and Armenia are making important progress towards a green economy and sustainable development, but many challenges still lie ahead.