Uploaded on 2017-02-24 by Khanh Duong Pham

2, This week I'll talk about my hometown in Vietnam, Hanoi, where the effects of the UHI can be seen clearly. In the summer, the temperature measured on the main roads can reach 50-60 degres C due to long exposure under the sun during the day without tree shadows. The density of transportation makes it even worst. It is a very bad experience to ride on the road (we mainly move by scooters rather than cars). When we go to more narrow streets in the old quarter where houses are more close from the two sides of the streets and there are more big trees it feels really better. However, the more it's hot the more people consume energy to cool their homes so one more time, the temperature outside raises due to the heat from air-conditioners. When we go outside the city, to the suburbs I don't think that's much better because of the heat reflects from the road of asphalt and the direct exposure from the sun due to low density. As long as we are near the urban area (whether it's the city or the suburbs), we feel bad. So I think that only the density of the urban area is not enough to measure the effect of UHI. Just when we go far away, into the real rural areas (the field, the forest, the mountain or the sea) that we can see clearly the difference. 3, If I can take part in the decision-making process of an initiative related to the UHI effect, I would propose to : Grow more trees with big shadow along the streets in order to supply the shadow and the humidity in the hot days of summer. Reduce the private vehicles and develop public transportation (of course if possible) Install the industrial zone more fare away from the city Reduce the density of population but keep the density of construction. The more narrow street the more comfortable it is ; the less people the less uncomfortable it is Use concret or other material rather than asphalt to make the roads Build the grid of streets accordint to the orientation of the sun and the cool wind 4, Of course the problem of the warmer earth concerns all states, however the distance from what they propose and what they realize is still far, especially with a developping country where the economy is still the top-most priority. I haven't seen much change since a few years, things just getting even worst due to the increase of urban population and the population.