This paper presents an Air Quality Monitoring System for the city of Cartagena de Indias. The goal of this system is to monitor the air quality in the city and to establish the current state of the air Cartagena's citizen breathe. Data is going to be acquired through a sensor network, and the information is going to be displayed on web or mobile application allowing access from anywhere in the world to anyone that may be interested. It is expected that the availability of this information allows research centers, educational institutions, and government to design plans for prevention and improvement of the air quality in the city based on historical and real-time data.

Mining, generally speaking, is an industry which consumes water in an intensive way, and when metal fineness is less and more mineral is extracted, the consumption of this important source will also increase. In the last 40 years alone, global production trends of the mineral extractive, manufacturing and services industries have grown steadily. In Peru, for example, it has reduced the total area of glaciers and fresh water in the coasts, where around 60% of the population lives. For reasons like the one above, it is becoming more and more necessary to identify and assess the impacts that this sector generates in order to be able to propose solutions at least for the most significant ones. In this article, using the life cycle assessment (LCA) software SimaPro, an assessment focused on large scale gold mining by heap leaching has been made, identifying that the processes that have the worst effects on the environment resulted to be processing, mainly, and leaching in second place. Moreover, the most affected impact categories were: climate change, agricultural land occupation, water and metal depletion. On the other hand, another three different impact categories, terrestrial, freshwater and marine ecotoxicity, showed an inverse result which could be translated as a potential positive impact, however due to the inventory and data collected, the affirmation cannot be possible to sustain.