Earth Day 2014 focues on green cities, mobilizing a millions of people to create a sustainable, healthy environment by greening communities worldwide. Today, more than half of the world’s population lives in cities. As the urban population grows and the effects of climate change worsen, our cities have to evolve. It’s time for us to invest in efficiency and renewable energy, rebuild our cities and towns, and begin to solve the climate crisis. Over the next two years, with a focus on Earth Day 2014, the Green Cities campaign will mobilize a global movement to accelerate this transition. Join us in calling for a new era of green cities. Mother Earth is a common expression for the planet Earth in a number of countries and regions, which reflects the interdependence that exists among human beings, other living species and the planet. For instance, Bolivians call Mother Earth Pachamama and Nicaraguans refer to her as Tonantzin. Recognizing that Mother Earth reflects the interdependence that exists among human beings, other living species and the planet we all inhabit, the General Assembly declared 22 April as International Mother Earth Day.