Water quality assessment for balneability at Porto Real beach, Porto Nacional/TO

The environmental problems with each passing day has been gaining greater prominence in the news media of the whole world, but in a negative way. Water, an exhaustible natural resource, has been suffering enough through the misuse socioeconomic and environmental problems, pollution of resources water. With the population growth, the cities are receiving industrial facilities and this generates an increase of waste dumped, affecting the groundwater, and consequently affecting the quality of the water. With that, this study was carried out to evaluate the water conditions of beach Porto Real located in the river of Tocantins, in Porto Nacional/TO, for the purpose of bathing, accordance with the resolution CONAMA nº 274/00. The Coliliert method was used to obtain the values ​​of faecal coliforms and the bacterium e-coli, the results showed low values, more than satisfactory, therefore, in the research period, Praia Porto Real waters presented satisfactory parameters in the bathing requirement.

The Conservation of Exhaustible Natural Resources in the GATT and WTO: Implications for the Conservation of Oil Resources

The conservation of exhaustible natural resources constitutes a prominent linkage and one of the ongoing debates in the relationship between trade liberalization and environmental sustainability. Indeed, the recognition of this linkage was embodied as an important exception to the rules of the GATT, which justifies a violating measure related “to the conservation of exhaustible natural resources”. The trade dispute settlement tribunals have remarkable experience in handling debates concerning the application of this crucial exception. However, the various decisions that were held in these debates have not yet examined the application of the exception to the interaction between trade and the conservation of oil as an exhaustible natural resource. This paper argues that the decisions of the dispute settlement systems of the GATT and WTO have limited and narrowed the scope of conserving exhaustible natural resources within the trade regime and, most probably, they would restrict the protection of oil resources in any future dispute. This paper will examine the various decisions relating to the tensions between trade and the conservation of exhaustible natural resources. It will demonstrate that the GATT and WTO tribunals focused the discussion of conserving exhaustible natural resources on the exceptions and not on the rules, and that they narrowed the application of the trade exception. It is most likely that this approach will limit the protection of any future oil-conserving measure.

On the determination of optimal time horizon in a control problem in natural resource economics

This paper is concerned with issues relating to the determination of optimal time horizon in a typical control problem of optimal extraction of an exhaustible natural resource. The paper extends the recent Highfill-McAsey results to cover all strictly concave utility functions.