Their vision is incredibly acute. One moment gliding majestically, they will swoop down like a flash of lightning to attack their prey. It is easy to understand why humans often choose the eagle as a symbol of power and beauty.
CyberDodo and Urban pollution (1-19)
It is basically the collection of pollutants created by cities, the number and dangerousness of these pollutants which would certainly surprise city dwellers everywhere ! Air, water, ground the entire environment is involved
Certainly, the situation is different in western countries versus in poorer countries, in countries with warmer climates as opposed to colder ones, but a global consciousness must definitely be engaged in order to make cities less polluted and hence less dangerous for their inhabitants.
Cities are the source of numerous dangerous gases, particularly vehicles (passenger cars, lorries, buses, etc) which produce, in particular, carbon dioxide (CO2), carbon monoxide (CO), sulphur dioxide (SO2), nitrous oxides (Nox), benzyne, ozone, etc. in addition to fine particles emitted by diesel motors which represent a serious threat to human health.
Heating installations use fossil fuels which also pollute the air of our cities. However, in numerous urban agglomerations, the main source of the deterioration of air quality is from industrial facilities which spew out veritable poisons into the air, which is then breathed by riverside residents.
Smog, which so commonly caps our famous megalopolises is a terrifying palpable demonstration of atmospheric pollution.
For more than a century, cities have functioned as super magnets, attracting millions of rural residents to their proverbial shores.
Each of these individuals has needed water to live, that is, to drink, to prepare food, and also to wash up and for other basic needs. Cities under constant development must therefore constantly increase their water resources and their water treatment capacities.
In numerous countries, this has created nearly insurmountable problems and hundreds of millions of human beings are not guaranteed daily access to potable water ; as regards wastewater the lack of effective collection and treatment facilities means that wastewater is often quite simply dumped back into Nature, often into the ocean, which creates serious and lasting pollution problems.
Lest we not forget the cleansing effect of rainwaters which wash numerous pollutants into the ground and other water sources, including lakes and oceans.
See our informational report on groundwater for more information.
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