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  2. List of global issues - Wikipedia

    en.wikipedia.org/wiki/List_of_global_issues

    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. Organizations that maintain or have published an official list of global issues include the United Nations, and the World Economic Forum.

  3. Reasons for concern - Wikipedia

    en.wikipedia.org/wiki/Reasons_for_concern

    The IPCC's five reasons for concern are: threats to endangered species and unique systems, damages from extreme climate events, effects that fall most heavily on developing countries and the poor within countries, global aggregate impacts (i.e., various measurements of total social, economic and ecological impacts), [2] [3] and large-scale high ...

  4. Market failure - Wikipedia

    en.wikipedia.org/wiki/Market_failure

    Different economists have different views about what events are the sources of market failure. Mainstream economic analysis widely accepts that a market failure (relative to Pareto efficiency) can occur for three main reasons: if the market is "monopolised" or a small group of businesses hold significant market power, if production of the good or service results in an externality (external ...

  5. Causes of climate change - Wikipedia

    en.wikipedia.org/wiki/Causes_of_climate_change

    Uncertainty over feedbacks, particularly cloud cover, [86] is the major reason why different climate models project different magnitudes of warming for a given amount of emissions. [87] As air warms, it can hold more moisture. Water vapour, as a potent greenhouse gas, holds heat in the atmosphere. [82]

  6. List of environmental issues - Wikipedia

    en.wikipedia.org/wiki/List_of_environmental_issues

    Environmental issues with war — Agent Orange • Depleted uranium • Military Superfund site (Category only) • Scorched earth • War and environmental law • Unexploded ordnance Overpopulation — Burial • Overpopulation in companion animals • Tragedy of the commons • Gender Imbalance in Developing Countries • Sub-replacement ...

  7. Environmental issues - Wikipedia

    en.wikipedia.org/wiki/Environmental_issues

    Environmental issues are disruptions in the usual function of ecosystems. [1] Further, these issues can be caused by humans ( human impact on the environment ) [ 2 ] or they can be natural. These issues are considered serious when the ecosystem cannot recover in the present situation, and catastrophic if the ecosystem is projected to certainly ...

  8. Fix problems sending AOL Mail

    help.aol.com/articles/aol-mail-troubleshooting

    If you're having problems sending mail, there are a few troubleshooting steps you can take to fix the problem. Restart your computer:. If you haven't shut down your computer in a while, we recommend that you begin troubleshooting by restarting your computer.

  9. Criticism of the Kyoto Protocol - Wikipedia

    en.wikipedia.org/wiki/Criticism_of_the_Kyoto...

    James E. Hansen, director of NASA's Goddard Institute for Space Studies and eminent climate scientist, has claimed that the United Nations Climate Change Conference taking place at the Bella Center in Copenhagen, Denmark, between December 7–18, 2009 (which includes the 15th Conference of the Parties (COP 15) to the United Nations Framework Convention on Climate Change and the 5th Meeting of ...