The construction of the hospital "Infanta Cristina" in the Madrid suburb of Parla, has caused a serious ecological impact.
On February 25, 2008, the hospital launched the "Infanta Cristina", located in the
Madrid town of Parla, a good news for the inhabitants of this town and residents in neighboring towns. However, the serious damage caused to nature, is not pleasant news. Its location near the creek Humanejos has caused tremendous environmental impact, to be affected one of the most ecologically valuable river stretches.
Thus the construction of a road that provides access to hospital from the town of Parla, has caused the total destruction of valuable riparian forest along this section accompanying the stream Humanejos. Moreover, this road has begun development of the rural landscape of the area.
Not content with the serious damage caused to the environment, cutting and pruning abusive been primed with the rest of the gallery forest was saved after the construction of access to the hospital. It appears, that the City of Parla, intended sweep this unique river ecosystem, to develop the
zo na. addition, in order to increase the capacity of transportation of sewage, the bed of the stream has been deepened, altering it. Such waste water has contaminated the entire water system Humanejos stream, discharged from the hospital without previous purification, making the river channel in an open air vent. Also, the natural water regime of the stream has moved from seasonal to permanent altering the entire ecosystem.
The construction of jetties on the banks near the hospital, has been a significant impact on the landscape, due to the profound transformation of the same, which have become forested bare stone walls and cement, giving a very artificial channel.
Despite being a short distance from the town of Parla, is
ta ecological barbarism has gone unnoticed for months, due to the apathy shown by both local and regional governments (pending social issues more politically profitable) as the local population, lacking the slightest environmental awareness. The decision to place this great medical center, near the creek Humanejos (the best preserved in southern stream Madrid), clearly indicates the "appreciation" that exists in this county for scarce natural areas, which largely focuses of biodiversity. In particular, only in Humanejos stream segment affected by the hospital, have been recorded up to 105 species of birds, of which 55 are breeding. In addition to 22 species of wintering birds, 10 species
migratory path, and 18 species present erratically. But animal biodiversity of the river course is not limited to birds, 17 species of mammals, 6 species of reptiles and 5 species of amphibians, inhabiting its shores and surrounding areas, as are countless species of invertebrates, the most notable to the Lepidoptera, being formidable bioindicators of environmental quality of ecosystems. 27 species of butterfly and 10 species, so far, of moths have been recorded in the stream.
The native forests of special ecological value, the tiles were vegetation mesomediterranean riparia (habitats of Community interest) whose flora was represented by trees, shrubs, vines and herbaceous helophytes and hydrophilic, and white poplar (Populus alba), poplar (Populus nigra), bardaguera (Salix atrocinerea), white twill (Salix salviifolia), white willow (Salix alba), willow (Salix fragilis), ash (F
raxinus angustifolia) negrillo elm (Ulmus minor), tamarisk (Tamarix sp.), Lycium (Lycium barbarum), hawthorn (Crataegus monogyna ), wild roses (Rosa canina, Rosas micrantha, Rosa corymbifera), bramble (Rubus ulmifolius), nightshade (Solanum dulcamara), cattail (Typha dominguensis, Typha latifolia), reed (Arundo donax), reed churrero (Scirpus holoschoenus), snapper (Scirpus maritimus), hard rush (Juncus inflexus) long sedge (Cyperus longus), bayunquillo (Eleocharis palustris) and reed (Carex sp.) Scrophularia nodosa, Veronica Anagallis-aquatica, Mentha suaveolens, Nasturtium officinalis, Calystegia sepium, Apium nodiflorum, Epilobium hirsutum, Myosoton aquaticum, Pulicaria paludosa, Glyceria fluitans, etc. 
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