Category «Environment»

Where the Ships die

Ship breaking – the company is very environmentally harmful, and it decided to only three countries in the world: Turkey, India and Bangladesh. The developed world sends its ships to die in the developing world, all the logic, of course. When the life of the ship near the end (which is usually 25-30 years), they …

The Global Positioning System

The Global Positioning System GPS is a satellite navigation system that allows users to locate their approximate position on Earth. There are 27 satellites orbiting Earth, as shown in the below picture, for use with GPS units. The satellites are positioned around Earth, and are constantly orbiting so that signals from at least three or …

Types of Maps – Projections

Projections Because Earth is spherical, it is difficult to represent on a piece of paper. Thus, all flat maps distort to some degree either the shapes or the areas of landmasses. Cartographers use projections to make maps. A map projection is made by transferring points and lines on a globe’s surface onto a sheet of …

Latitude and Longitude

Latitude Maps are flat models of three-dimensional objects. For thousands of years people have used maps to define borders and to find places. The map at the beginning of this chapter was made in 1570. What do you notice about the size and shape of the continents? Today, more information is available to create more …

What makes a city green?

Efficiency Over half of humans now live in cities. Environmental scientists have often criticized cities for expanding into farmland  and for their tremendous consumption of energy, water, food, concrete, and land. But the environmental cost per person is usually lower for urban living than for suburban or rural living, especially in wealthy countries. Because they …

Renewable resources

Though water and biological living resources are considered renewable. They are in fact renewable only within certain limits. They are linked to natural cycles such as the water cycle. • Fresh water (even after being used) is evaporated by the sun’s energy, forms water vapour and is reformed in clouds and falls to earth as …

Urban Planning

Transportation is crucial in city development Most of the world’s major cities grew up around a port, a river crossing, a railroad hub, or some other focal point for transportation. Often, those original reasons for city placement no longer apply, and a location that made sense for a small, backwoods community no longer works for …

Non-renewable resources

These are minerals that have been formed in the lithosphere over millions of years and constitute a closed system. These non-renewable resources, once used, remain on earth in a different form and, unless recycled, become waste material. Non-renewable resources include fossil fuels such as oil and coal, which if extracted at the present rate, will …

Renewable and non Renewable resources

Ecosystems act as resource producers and processors. Solar energy is the main driving force of ecological systems, providing energy for the growth of plants in forests, grasslands and aquatic ecosystems. A forest recycles its plant material slowly by continuously returning its dead material, leaves, branches, etc. to the soil. Grasslands recycle material much faster than …