Green buildings are designed, built, renovated, operated or reused in an ecological and resource-efficient manner to reduce environmental impact. They use energy, water and other resources more efficiently while also improving occupant health and environmental and economic performance. Green buildings utilize materials that are non-toxic, sustainable, reusable and recyclable. They are often certified under systems like LEED which rate environmental attributes. Green buildings provide benefits like saving energy and water, managing stormwater, moderating temperature, reducing waste and emissions, and allowing for recycling. They are better equipped to deal with global issues like climate change, pollution and help mitigate further global warming.