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A discourse on the concept of global warming in this paper needs to be contextually placed within the ecological systems of the planet earth and human security. The planet earth is made up of ecological systems that manifest in the variety of biodiversity with its added values of goods and services they provide which are usually referred to as ‘gifts of nature’. For instance, four major areas of these values may be identified. The first is the provision of services by which the harvestable products of foods, medicines, fresh water, wood and fibres, fuel wood and other non-wood products, including the genetic resources for improving these products, flow from ecosystems to support humans. In addition, biodiversity boosts ecosystem productivity where each species no matter how small, all have an important role to play. The second is in its regulating services for local and global climate, including carbon sequestration, regulation of water quality, diseases, pollution and flood. For example, a large number of plant species means a greater variety of crops, greater species diversity ensures natural sustainability for all life forms; and healthy ecosystems can better withstand and recover from a variety of disasters. Provision of cultural services is the third. This includes the aesthetic, spiritual, educational, scientific and recreational values. The last is in its supporting services it provides through its role in making the above three functions to happen. For instance, it mediates nutrient cycling, soil formation, pollination and primary production. The ecosystem services are intrinsically linked to the constituents of human well-being of security, availability and access to the basic needs of livelihood of food, shelter and other materials. Other areas are those of health, recreation, eco-tourism, spiritual well-being and culture. Maintenance of biodiversity unites human generations of the past, present and future. It is therefore mandatory that natural resources which are an intrinsic part of biodiversity be protected. The major classes of these natural resources consist of agricultural land, forest land and its multiple products and services, natural land areas preserved for aesthetic, recreational and scientific purposes, fresh and salt water fisheries, mineral resources that include the mineral fuels and non-fuels, the renewable non-mineral energy sources of solar, tidal, wind and geothermal systems, water resources, the wasteassimilative capacities of all parts of the environment. Some natural resource stock is renewable by natural or artificial processes while others are non-renewable. Those that are

Human Security and Global Warming: Challenges Before Christianity and Islam in Nigeria