Sweeping changes in architectural design have further extended the notion of hot outdoor plan, which has increasingly grown in popularity among urban and rural homeowners, owing its fame to low maintenance costs and superior style. Marcus Hiles has noticed the urgent appetite for open-air living spaces in the housing market that are reasonably low price and inflict no harm on the nature. Environmentally clean, sustainability-oriented choices have replaced old fashion designs and brought out the innovative solutions like permeable pavements and rainwater harvesting systems. Using the rooftop water collection system, the moisture transfers from the air to wells where it is kept for storage and evaluated before being reprocessed on-site. Graywater recycling is implemented through the accumulation of the previously used water coming from multiple streams of households and office buildings, including from showers, tubs, baths, and washing machines. The rainwater/graywater system recycles the gently used water and deposits it for reuse in rest rooms, sinks and irrigation, as such resulting in the reduced demand for purification and sterilization of water. Another pivotal trend in architectural designs is permeable paving, which dates back many centuries, to the era when people started constructing roads by locating recycled concrete, stones, and crushed bricks on top of the beds as means of drainage purposes. As such, rainwater ran through small apertures between gravel, paving material, fabric, and sand – the four layers of filtration, until it was completely absorbed into the earth. While permeable paving is highly appreciated by pro-green advocates, this type of surfacing also has a number of other incompatible advantages. It crucially eliminates the pollution and runoff, balances the flow of storm water to drains and spillways, restocks underground water supplies and enhances solid pavement skid resistance for patios, walkways and driveways.