world's timer hourglass with earth signifies the pressing global warming challenge

mobile wallpaper andriod iphone screen display verticalworld 039 timer hourglass earth pressing global warming challenge environment climate change crisis urgent alarm tipping point carbon emissions greenhouse gases temperature rise melting ice caps rising sea levels extreme weather events deforestation pollution unsustainable renewable energy clean technology conservation sustainability mitigation adaptation biodiversity ecosystem paris agreement action fossil fuels footprint justice emergency world's signifies vertical