Step-by-step explanation:
Note: UN is an acronym which fully means United Nations; an organization set up by a coalition of several Nations with a vision of solving humanity's problems.
CLIMATE CHANGE refers to man made activities that have resulted in abnormal weather conditions in the world.
UN Agency: Intergovernmental panel on Climate change (IPCC), United Nations Development Organization (UNDP)
HEALTH AND MEDICINE are a big concern for all Nations of the earth today because of the emergence emergence of new diseases which kills thousands every year.
UN Agency: World Health Organization (WHO)
HUMAN RIGHTS issues are ever becoming a hot topic today as the less privilege in society are often discriminated against.
UN Agency: United Nations Educational, Scientific and Cultural Organization (UNESCO), Human Rights Watch
WEAPONS OF MASS DESTRUCTION such as Atomic bombs and the general threat of nuclear war by some Nations has made this a growing concern.
UN Agency: United Nations Office for Disarmament Affairs (UNODA), International Atomic Energy Agency (IAEA), Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization.
GLOBAL TRADE is still lacking in many parts of the world, and so achieving economic prosperity is believed to be possible only through global trade.
UN Agency: UN Inter-Agency Cluster on Trade and Productive Capacity (UNCTAD).
ACCESS TO WATER is still limited and in some inexistent, thus, the United Nations has organizations that seeks to ensure everyone has access to clean water.
UN Agency: UN-Water, World Health Organization (WHO), World Food Program (WFP).
ENERGY SOURCES aren't available in some places and not all energy sources are considered safe, and so the UN tries to solve this problem.
UN Agency: United Nations Energy (UN-Energy)
TERRORISM AND COUNTERTERRORISM: with a rising threat of terrorism, a big concern for governments today is to combat or prevent terrorism.
UN Agency: United Nations Counter Terrorism Center (UNCTC)