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Environmental Impact Assessments (EIAs) are designed to evaluate all reasonably foreseeable environmental consequences of human activities. Appropriate governmental scientists traditionally produced EIAs for management agencies in many countries. However, many EIAs are now contracted out, often to the lowest bidder without due consideration of expertise. Others suffer from limited agency resources. Consequently, many EIAs have become insufficiently researched documents that draw heavily from previous EIAs while being rushed to completion to meet legislative deadlines or avoid delaying projects. Habitual treatment of topics often ignores recent scientific literature, perpetuating previous misconceptions and analytical flaws. Common problems in EIAs discussing wildlife include: a focus on lethal takes, with little consideration of non-lethal impacts or habitat degradation; a general dismissal of the possibility that non-significant (to the resource) impacts can, when combined, become significant; and the assumption that behavioral habituation in animals represents an end of impact. Incentive to break the cycle is somewhat lacking in this now often commercially competitive environment, where contracts are increasingly awarded by industry, generating potential conflict of interest. We believe investment in thorough, impartially written, scientifically-based and up-to-date EIAs is important for appropriately representing and managing ecosystems and their resources and avoiding potentially expensive litigation.
In this work is developed a proposal of environment indicators needed for the Environment Impact Assessment (EIA) process in Mexico’s Federal District (FD); through which are authorized the construction and realization of different work actions and activities. The methodology is based on the combination of cabinet and field work, performed in three stages. In the first, a documental review was carried out within the topic of Environment Impact (EI), the EIA and the study area, with a subsequent analysis of the environment indicators at an international, national and regional scale. In the second, the systematization of information was performed for the sixteen study cases at a local scale and the organization and analysis of a data base with the allotted information. And in the last stage, a field work was realized with participative observations in three verification sites and interview applications to the principal actors of the EIA process. These results allowed: to determine the main limitations within the EIA process (methodological, technical and operational), to propose an indicators scheme, and to formulate recommendations focused on the improvement of this Environment Public Policy instrument.
Isli and Tislit, the Moroccan “Romeo and Juliette” according
to a popular legend gave their name to a twin lakes in Imilchil. There we show evidences
that these two lakes are impact craters. The proof as follow: 1) the fragments of iron meteorites found on both sides of Isli and Tislit
lakes belong to the same parent meteorite and siderite type; 2) the sedimentary
formations which are almost tabular in the area
of the lakes become tilted with a centripetal sloping all around and towards Isli
lake; 3) the circular shape of the Tislit lake is similar to that of the Isli lake; 4) the impact
breccias found on the south of the Isli lake contain shocked quartz crystals; 5) the radial
fractures of high pressure affect some sedimentary beds. All these observations
give evidence of the presence of an impact crater due to the fall of meteorites.