Environmental issues

Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental Science provides an integrated, quantitative, and interdisciplinary approach to the study of environmental systems. During the 1970s, while the developed world was considering the effects of the global population explosion, pollution and consumerism, the developing countries, faced with continued poverty and deprivation, regarded development as essential - to meet their need for the necessities of food, clean water and shelter. The 1972 United Nations Conference on the Human Environment, held in Stockholm was the UN's first major conference on international environmental issues and marked the beginning of global cooperation in developing environmental policies and strategies. In 1980 the International Union for Conservation of Nature published its influential World Conservation Strategy, followed in 1982 by its World Charter for Nature, which drew attention to the decline of the world's ecosystems. Confronted with the differing priorities of the developed and developing world, the United Nation's World Commission on Environment and Development (the Brundtland Commission) worked for two years to try and resolve the apparent conflict between the environment and development. The Commission concluded that the approach to development must change: it must become sustainable development. Development, in the Commission's view needed to be directed to meeting the needs of the poor in a way that no longer caused environmental problems, but rather helped to solve them or, in the words of the Commission in 1987:

Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

In the same year the Commission's influential report Our Common Future was published. The 1992 UN Environmental Summit in Rio de Janeiro, Brazil produced the Rio Declaration on Environment and Development Earth Summit (1992) with an action agenda, Agenda 21, overseen by the Commission on Sustainable Development.. At Rio negotiations also began for an international agreement on climate change (which eventually led to the Kyoto Protocol); agreements on forestry were forged and the Convention on Biological Diversity was initiated. By the time of the World Summit on Sustainable Development (Earth Summit 2002), held in Johannesburg, delegates included representatives from the World Business Council for Sustainable Development and thousands of local governments reporting on how they had implemented Local Agenda 21 and the Cities for Climate Protection program. A broad-based consensus had been reached on what was to be done. This Summit, building on the 2000 United Nations Millennium Declaration, produced eight Millennium Development Goals for 2015 (adopted by 189 countries) and established the "WEHAB" targets for water, energy, health, agriculture, and biodiversity.

The 2005 World Summit on sustainable development in New York declared that, to be effective, action on sustainability must involve cooperation across three sustainability "pillars": environment, society and economy. Although it is critical that there is cooperation between the three pillars, in practice this often entails negotiation between competing interests.

The path of international sustainable development has never been smooth; it has many detractors. It treads the difficult path between opulent western consumer societies and the abject poverty of the developing countries of the world; between economic demands for local and global growth and environmental demands for biological and resource conservation; closely linked to these concerns are social factors that impact on environmental sustainability, such as global security, international migration, population control and global environmental legislation including the Convention on Biological Diversity, agreements on forestry, climate change, desertification, etc.