In short, if we reduce warm ambient temperatures there is less demand for cooling, resulting in less demand for energy. In addition to urban areas absorbing and radiating heat, climate change means there is and will continue to be more heat to absorb. More and more people will find themselves in extreme heat zones in the next few decades. This means that summer temperatures and associated urban heat islands are expected to worsen.
Anything we can do to dissipate heat could be a vital part of combating urban heat zones. Green roofs are one of the most effective ways of combating the urban heat island effect. Green roofs also help support wildlife by giving urban concrete jungles a dose of green space. Each green roof will support varying habitats, dependent largely on the type of vegetation included.
According to a survey in Switzerland, a study of 11 green rooftops found there to be an incredible separate species. Air pollution plagues urban areas around the world. The World Health Organization estimates that air pollution kills seven million people each year. As you would expect, air pollution is a greater problem in urban areas, especially the larger cities such as London, Los Angeles, Manila, New York City and Paris. The definition of a rooftop garden is really pretty simple:.
We know; blew your mind there. It can have some or all of the characteristics of a garden on the ground, including plants, water features, wildlife habitat, gathering spaces and watering mechanisms. The terms rooftop garden and green roof are sometimes confused. Admittedly, the two do share some significant similarities, including a need for roof protection, waterproofing, drainage, growing media and a means of monitoring the health of the ecosystem once installed.
Their construction process is also similar in many ways. However, a rooftop garden is only one type of green roof. The main difference between it and other green roofs are the size of plants grown, and therefore the planting depths required.
Rooftop gardens may also incorporate architectural features, walkways and even outdoor kitchens. This is known as an intensive green roof. Leave it in the sun for 30 minutes. You'll want to test both boxes in the same cloud conditions, specifically when it is sunny and warm out for the entire 30 minutes that each box is outside. If cloud conditions change when you are testing a box, try to retest it again later when it's warm and sunny out.
How hot is it inside the box? After it has adjusted to the shade, read the temperature. How hot is it in the shade? How does this compare to how hot it was in the box? How hot did it get in the box without sod on it after 30 minutes? How does this compare to how hot it is in the shade, outside of the box?
Can you explain your results? How does the temperature of the boxes change over the course of a day? What kinds of plants work best? Does soil depth alter the temperature results? To do this, repeat this activity but this time test the boxes on a cooler day or indoors and put a layer of ice cubes on top of the boxes.
Cover the boxes first with plastic wrap to keep them dry. You could alternatively place the boxes on top of a tray of ice again covered with plastic wrap. Which box stays the warmest in winter-like conditions Observations and results Did the box with the "rooftop garden" stay cooler than the plain box?
It's thought that rooftop gardens might be able to diminish the urban heat island effect. Generally, rooftop gardens absorb heat and insulate buildings better than traditional tar and gravel roofs.
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