New York, Sha'ban 18, 1436, Jun 5, 2015, SPA -- With many of the earth’s ecosystems nearing "critical tipping points," the United Nations invited each of the seven billion people on the planet to mark this year’s World Environment Day by making one change towards a more responsible consumption of resources – "be it refusing to buy single-use plastic bags or riding a bike to work." "Humanity continues to consume far more natural resources than the planet can sustainably provide," Secretary-General Ban Ki-moon said in this year’s message for the Day, observed annually on 5 June. "It is time for us to change." "The goal of sustainable development is to increase the quality of life for all people without increasing environmental degradation and without compromising the resource needs of future generations," he noted. The theme of this year’s Day – "Seven Billion Dreams. One Planet. Consume with Care," – emphasizes the personal responsibility each person bears for enabling inclusive and sustainable economic development while stabilizing and reducing the rate of resource use. --SPA 23:22 LOCAL TIME 20:22 GMT www.spa.gov.sa/w