aerial view of a flooded city, a stark reminder of the devastating effects of climate change

city climate change global warming rising sea levels flooding extreme weather heat waves droughts air pollution deforestation water scarcity coastal erosion urban island effect precipitation melting glaciers carbon emissions greenhouse gases green energy renewable sustainable cities adaptation mitigation resilience justice planning environmentalism sustainability action ecofriendly lowcarbon zeroemission neutral financing capture environmental protection buildings transportation greening smart emergency crisis accord policy earth day cop26