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A global issue is a matter of public concern worldwide. This list of global issues presents problems or phenomena affecting people around the world, including but not limited to widespread social issues , economic issues , and environmental issues .
Climate change — Global warming • Global dimming • Fossil fuels • Sea level rise • Greenhouse gas • Ocean acidification • Shutdown of thermohaline circulation • Environmental impact of the coal industry • Urban heat islands • Flooding; Environmental degradation — Loss of biodiversity • Habitat destruction • Invasive ...
Grand challenges are more than ordinary research questions or priorities, they are end results or outcomes that are global in scale; very difficult to accomplish, yet offer hope of being ultimately tractable; demand an extensive number of research projects across many technical and non-technical disciplines and accompanied by well-defined metrics.
Environment destruction caused by humans is a global, ongoing problem. [4] Water pollution also cause problems to marine life. [5] Some scholars believe that the projected peak global population of roughly 9-10 billion people could live sustainably within the earth's ecosystems if humans worked to live sustainably within planetary boundaries.
The Grand Challenges in Global Health (GCGH) is a research initiative launched by the Bill & Melinda Gates Foundation [1] in search of solutions to health problems in the developing world. Fifteen challenges are categorized in groups among seven stated goals plus an eighth group for family health.
There have been debates on the best responses to slow global warming, and their timing. The debates are around the specific actions for climate change mitigation and climate change adaptation, or climate action in general. See for example: Economic analysis of climate change; Climate change denial#Delaying climate change mitigation measures
Because of the impact of humans on the natural environment in the recent geological period, the term ecological crisis is often applied to environmental issues caused by human civilizations such as: the climate crisis, biodiversity loss and plastic pollution which have emerged as major global challenges during the first few decades of the 21st ...
Another challenge in global governance through multilateralism involves national sovereignty. Regardless of the erosion of nation-states' legal and operational sovereignty in international relations, "nation-states remain the ultimate locus of authoritative decision making regarding most facets of public and private life". [21]