Introduction

In the Caribbean and other developing regions, urban areas and populations are growing. Cities
are both engines for growth and sources of concentrated environmental problems. People flock to
urban areas to seek employment, entertainment, shopping, and a generally higher standard of
living. At the same time environmental infrastructure of works and services are inadequate to
serve the resulting increases in population and population densities. The inevitable congestion
causes environmental hazards and degradation until strategies for reversing environmental
deterioration can be implemented.
The magnitude of urban population growth in developing countries is a direct indicator of the
degree of spatial concentration of people, industries, commerce, vehicles, energy consumption,
water use, waste generation, and other environmental stresses. Generally, most countries seek to
generate increasing economic development whic h tend to exacerbate such problems which may
exceed both the preventive and solution capacity of the government as well as the assimilative
capacity of nature.
Another determinant of the severity of environmental conditions within and around urban areas
is their regional ecosystem type, such as: coastal, humid-tropical, mountainous, riverine, …etc.
These urban ecological types are also critical factors in determining optimum environmental
strategies and plans for specific and sustainable urban development.
An important goal in the new millennium is to make existing and new urban areas more selfsufficient,
sustainable, and enjoyable places to live.
Physical Planning
Land-use planning is a complex process involving development of a land-use to include a
statement of land-use issues, goals, and objectives; summary of data collection and analysis;
land-classification map; and report describing and indicating appropriate development in areas of
special environmental concern.
Because land use decisions are critical determinants of environmental quality it is imperative that
land use controls be effectively practiced to combat such problems as pollution, the occupation
of hazard-prone areas, the degradation of wetlands and other coastal resources, and the loss of
open space and other cultural resources. The ways to accomplish these are:
· Land Use and Maintenance: Ecological land-use planning, building/area restoration, open space
preservation, tree planting, community gardens, ..etc.
· Energy Efficiency: Energy efficient buildings and energy conservation in general
· Water: Water conservation, and waste water reuse. · Food: Increased food growing using less
synthetic chemicals.
· Pollution Control: Recycling of food and other solid wastes, reduction of Indus trial wastes,
enforcing air/noise pollution control.
· Economic Development: Increases in investment and social services in rural areas to reduce the
move into urban areas.
· Population Growth: Reduction in national population growth rate.
Environmental Health Management
Environmental health engineering is a main feature of environmental health management and is
normally defined as "the branch of engineering that is concerned with protecting the environment
from the potentially deleterious effects of human activity, protecting human populations from the
effects of adverse environmental factors, and improving environmental quality for human health
and well-being." An inventory of such engineering responsibilities would include:
- Environmental planning of infrastructural works and services;
- Resource pollution/degradation prevention (Air, Water, Land, Energy)
- Waste management (liquid and solid)
- Public health aspects (food safety, vector control)
- Housing, institutions and the built environment
- Environmental emergencies (natural and man-made)
Thirteen features of modern environmental health engineering are at Box 1. Also included are
the synergistic demands of cross-sectoral activities.
The environmental health engineer adapts the principles of natural physical, chemical and
biological systems to engineered systems for water supply, waste disposal, pollution control,..etc.
His unique role is to utilize modern engineering techniques in copying the self-cleansing
mechanisms of nature while accommodating the constraints and limitations. The goal of this
engineering sub-discipline (of civil engineering) is to harmonize the powers of technology with
the potentialities of natural processes.
Sustainable Development
Development is about improving the well-being of people. Raising living standards and
improving education, health, and equality of opportunity are all desirable and are essential
components of economic development, which were fully practised in Trinidad and Tobago in the
sixties after independence was won - 31, August 1962. But 5-year development programmes and
the establishment of industrial development institutions (e.g. Industrial Development
Corporation) helped to promote economic growth which led to environmental deterioration in the
absence of an effective national environmental management programme. Also, such growth took
little notice of the social aspects of development, urban or otherwise; and the neglect of human
welfare was felt at all levels of society.
Sustainable development, on the other hand, is development that lasts, because in addition to an
economic component, there are social and environmental components. So that sustainable
development must be a pro-active strategy to develop sustainability. As it was proposed initially
by the World Commission on Environment and Development (1987) sustainable development
must meet "the needs of the present without compromising the ability of future generations to
meet their own needs." Sustainable development requires mobilizing governments, the private
sector, and the general public toward sustainable communities. And "sustainable urban
development is ultimately a cultural statement about ourselves, how we want to live, and our
ability to manage our needs, desires, and dreams in ways that are effective and caring." (See the
key Environmental Issues of the UN Conference on Environment and Development, Rio de
Janeiro, June 1992)