This study aims to model the dispersion of two pollutants: nitrogen oxides (NOx) and sulfur dioxide (SO2) from an onsite biogas fueled generator by using CALPUFF modeling system. CALPUFF is a non-steady state puff simulating software that takes into account, meteorological data, terrain data and land use data, to effectively simulate dispersion from a given source. These data are taken from the different governmental and accredited organizations and used in conjunction with CALPUFF. Results showed a wider dispersion of both pollutants in January as supposed to June. This was due to rapid changes of wind's speed and directionin the month of January. It was also discovered that the emission results were well below the point of impregnation (POI) limits set by the Ministry of Environment for its 24 hour, 1 hour and 30 minute averaging time periods of exposure. The findings of this study reveal that the proposed facility's operation is in compliance with the Ontario regulations and that it should be able to operate in accordance with them, in the winter and summer seasons.

Recently, the Egyptian government has announced sustainability as the sin quo for any development plans on all the governmental sectors. The Egyptian urban development sector has been the main target concerning the ability to introduce sustainability aiming to minimize the negative impacts of the sector. Although, the government plans to introduce sustainability the achieved development is still existing negative impacts especially on the environmental dimension. The situation urges for a new approach that bare the ability to satisfy the development of the sector while maintaining and preserving the environmental assets of the developed urban areas. The paper aiming to target the appropriate approach conducted a comparative analytical study for the various new urban development approaches. The study ‫أ‬ ‫.د‬ . ‫بشندي‬ ‫حسنين‬ ‫يوسف‬ ‫سعاد‬

This research is focused on a modern technique and offers a framework that maximizes the concept of the efficient landscape that focused on microalgae technology. Industrial areas have become a threat to most of the countries; particularly unused industrial areas represent a wide area. as a result, it has become a time bomb, so scientists and designers have gone to search for the most efficient ways of using green microalgae to solve this issue and combine it with the elements of landscape features where green microalgae can be grown within open ponds (Open Race Way Ponds) in the industrial areas to become a tool with two advantages: organic green fuel (Productive Landscape),also algae represents an aesthetic view through the various green color tones and movement of microalgae in its various colors drawing a rainbow on the ground and you will saw it on its natural green radiation at night (Natural Green (Nightscape)). All of this needs wastewater or salty water and carbon dioxide, solar radiation as inputs for algae breeding, i.e. waste transfer to useful urban potentials (Positive to Negative and thus the industrial spaces will be converted to human spaces and this represent the main objective for the research that radiate vitality day and night and become a source of oxygen, where algae produce 6 times the oxygen of trees. Through this research, a framework will be presented to use these strains in the spaces of industrial areas as a new approach in the landscape trends and theme.