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286C H A P T E R X V I Im) Installations for the treatment, confinement, or elimination of hazardous wastesand radioactive wastes;n) Exploitation of timber from tropical forests and species difficult to regenerate;o) Forestry plantations;p) Changes in the use of the land in forested areas and in jungles and arid zones;q) Industrial parks that will engage in highly risky activities;r) Real estate developments that affect coastal ecosystems;s) Works and activities in wetlands, mangroves, lagoons, rivers, lakes, and estuariesconnected with the sea, as well as on their shores or in federal zones;t) Works in protected natural areas;u) Fishing activities that could put at risk the survival of one or more species or causedamage to ecosystems;v) Aquaculture activities that could put at risk the survival of one or more species orcause damage to ecosystems;w) Agricultural and livestock activities that could put at risk the survival of one or morespecies or cause damage to ecosystems.2.1. Environmental Impact StatementAll works or activities that could cause a change to the environment must be supportedby an environmental impact statement consisting of a document by which, onthe basis of studies, any significant and potential environmental impact that work oractivity would generate is indicated, as well as how to avoid or mitigate it if the impactis negative.Once the environmental impact statement is presented, it will be evaluated accordingto the guidelines established by the LGEEPA and the Environmental Impact Regulation.The evaluation of environmental impact consists of the procedure through whichSEMARNAT establishes the conditions to which the works and activities that could causeecological imbalance or surpass the limits and conditions established in the provisionsapplicable to environmental protection will be subject.The environmental impact statement that the interested parties must present toSEMARNAT should include a description of the possible effects on the ecosystem(s) of thework or activity in question, establishing preventive, mitigating, or other necessarymeasures in order to avoid and reduce to a minimum the negative effects on the environment.SEMARNAT provides to the petitioners guidelines to facilitate the preparationand delivery of the environmental impact statement depending on the type of work oractivity to be carried out, which guidelines are published in the Official Federal Gazetteand in the Ecology Gazette (Gaceta Ecológica).