The unhealthiness of the city is chiefly due to want of proper drainage, impure drinkingwater, miasma from the disturbed rubbish heaps, and contaminated dust from the uncleansed roads and streets.
Among elements of unhealthiness is next to be reckoned the proximity of native villages, the inhabitants of which are infected.
The inhabitants, notwithstanding the unhealthiness of their climate, are a strong and athletic race, belying their yellow and sickly appearance.
In an endeavour to stop the slave trade and piracy, the islands were garrisoned (1812-1813) by British troops, but the unhealthiness of the climate led to their withdrawal.
Mangrove swamps surround the town and epidemics of cholera, yellow fever and other tropical diseases have been frequent; but the unhealthiness of the climate is mitigated to some extent by the high tides which cover the marshes, and the invigorating breezes which blow in from the sea.
The unhealthiness of certain portions of the county caused by the marshes is practically removed by draining.
In 1699 Batavia was visited by a terrible earthquake, and the streams were choked by the mud from the volcano of Gunong Salak; they overflowed the surrounding country and made it a swamp, by which the climate was so affected that the city became notorious for its unhealthiness, and was in great danger of being altogether abandoned.
The great fertility of these regions and the marvellous wealth of their forests are irresistible attractions to industrial and commercial enterprise, but their unhealthiness restricts development and is a bar to any satisfactory increase in population.
In view of the unhealthiness of Vera Cruz, the convention of Soledad was concluded with the Mexican government, permitting the foreign troops to advance to Orizaba and incidentally recognizing Mexican independence.
The trees for a considerable period show little sign of unhealthiness, but eventually the stem begins to swell somewhat near the root, and the whole tree gradually goes off as the disease advances; when cut down, the trunk is found to be decayed at the centre, the " rot " usually commencing near the ground.
Trees of good size are thus rendered nearly worthless, often showing little sign of unhealthiness till felled.
But the unhealthiness of Rio de Janeiro in past years may be charged to insanitary conditions and not to the climate.
At first the loss of life, owing to the unhealthiness of the climate, was appalling; but in spite of that fact it gradually prospered, until it reached its present position as the second port and city of India.
In imperial times the unhealthiness of the place led to its rapid decline, though it remained a colony.
Its remoteness from the ports and harbours of the country, combined with the extreme unhealthiness of its situation, have led to its gradual decay subsequently to the formation of the comparatively recent settlement of Akyab, which place is now the chief town of the province.
Owing to its unhealthiness it is now almost deserted, being only occupied by the Afghan regiment quartered there.
The Old Bailey revelations removed all doubt as to the essential unhealthiness of his personal influence; but his literary genius was none the less remarkable, and his plays were perhaps the most original contributions to English dramatic writing during the period.
The Russians remained in Gilan until 1734, when they were obliged to evacuate it, owing to the unhealthiness of the climate.
Besides this, the extreme unhealthiness of its most productive regions, the Choco and Barbacoas districts on the Pacific slope, has been a serious obstacle to foreign enterprise.