Study shows green roofs can cool cities and save BILLIONS in energy costs

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  • Опубліковано 15 січ 2025

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  • @alanbgtan
    @alanbgtan 11 місяців тому +18

    These green buildings with plants on roof, climbing plants on balconies so called vertical greenery has been in place in Singapore for the last 15 years. Singapore wanted a green city & gave good return to the world unselfishly.
    Now all Asian countries started the trend few years back & save the global heat

    • @icosthop9998
      @icosthop9998 11 місяців тому +1

      Nice

    • @M13x13M
      @M13x13M 11 місяців тому +1

      How long do they last? Maintenance is extreme so here in the states they install them for the PR value and when they begin to fail and ugly out they are removed.

    • @janetrussell3288
      @janetrussell3288 11 місяців тому +1

      In Singapore it rains almost every day. In consequence the green roof and walls do well and look lush year round.

    • @M13x13M
      @M13x13M 11 місяців тому

      @@janetrussell3288 They don't do anything in a humid warm climate other than add a huge amount of weight to a building and increasing energy costs because Fiberglass insulation is a far cheaper way to save energy

  • @vanrozay8871
    @vanrozay8871 11 місяців тому +4

    The ultimate setup for green roofs are as solar panels shading and cooling plantings beneath, whose roots grow down into fish channels, aerated and with circulation keeping water from stagnating. The fish are fed; their poop feeds the plants; the water humidifies and cools the crops; and both lower levels cool the panels, making them more productive. Mutual benefits all around. Green!

  • @JorgeLausell
    @JorgeLausell 11 місяців тому +2

    So good to hear more from you than tense tesla stuff.
    More please.

  • @hoffinger
    @hoffinger 11 місяців тому +5

    I have been trying to get neighbors to use light colored roofs when reroofing but most people just use black. Afterwards they all need fans or ac they didn't need before. I planted trees and the air temp on the summer is 3 to 5 degrees F cooler. My neighbors are cutting down their trees. They don't like the maintenance.

    • @mariebaxter473
      @mariebaxter473 11 місяців тому +1

      Seeing my neighbours cutting down there trees due to maintenance issues spurned me on to plant new trees close to there bounderies , drives them nuts ,LOL

    • @M13x13M
      @M13x13M 11 місяців тому

      I have added electronic temperature sensors around my home . I thought I might be able to gain some solar heating with a dark roof but so far I don't see much difference. Solar gain math contains a time variable (T) . So a white roof may reflect more heat at first but give it an hour or so and it is the same temperature in the confined attic as a dark roof. After a certain temperature maybe 130 degrees they start to even out because the hotter the temperature the faster something loses heat. Also what your eye sees as reflective is not necessarily what infra heat ( invisible) sees as reflective. I've put my temperature sensors on what looks like black metal and it was cooler than a much lighter gray metal. Modern shingles have heat reflective granules in the composition material.

  • @glenmcd
    @glenmcd 11 місяців тому +4

    Seems logical that taking it a step further, living underground may reduce energy costs even more, and you still have your "green roof". That said, heavy rains may be an issue if not sufficiently designed for.

  • @SkepticalCaveman
    @SkepticalCaveman 11 місяців тому +1

    An other option is painting roofs with reflective paint, if a green roof is not possible.

  • @doug.horne2378
    @doug.horne2378 11 місяців тому +1

    People who live in free standing suburban homes already spend the greater part of their summer weekends maintaining their gardens. Now we have to mow, weed and prune the roof as well? The death and injury rate of people falling off roofs would be worse than the road toll. The practical implications are just just crazy.

  • @humnpwr
    @humnpwr 11 місяців тому +2

    Love your episodes. My lovely late wife was a green roof specialist for a large roofing supply business in Toronto.

  • @PeeJay3714
    @PeeJay3714 11 місяців тому

    I posted 3 years ago about BKK when my wife was visiting her family. She mentioned how much more pollution there was and temperatures were very high. I suggested to her to start vlog about this , she didn't of course she thought I was nuts. I researched and found many new tech green methods to lowering temps and cleansing air. Most plants are Vining and don't require much water. Please water catchment can be implemented to water these plants. Green walls on all buildings, green and solar bus stops , E Tuk Tuks, E Bikes. scooters, if this was implemented it would mitigate most of the flooding that occurs in BKK and would cool and cleanse air outdoors and indoor Temps would be lowered using less energy to cool public and private buildings interiors. Simple low tech changes can impact a lot. Another benefit is all the greenery will attract shelter and micro ecosystem for animals , insects . Exposure to plants calms people that are stressed that live in polluted cities. Health of citizens will be improved as well.

  • @sterobloc6645
    @sterobloc6645 11 місяців тому +11

    How about a review covering rusty Cybertrucks?

    • @charlesrovira5707
      @charlesrovira5707 11 місяців тому +2

      Try using a *Brillo* pad and *Bar Keepers Friend* powder cleanser.
      If you're that concerned about the looks of your *CyberTruck,* get it wrapped.

    • @xiaoka
      @xiaoka 11 місяців тому

      Apparently this is something Delorean owners have dealt with for 40+ years.

    • @DiabloEnthusiast
      @DiabloEnthusiast 11 місяців тому +1

      Sam covered the Byd rust story so should only be fair if he also covers the cybertruck rusting after only 11 days of ownership story

    • @rozonoemi9374
      @rozonoemi9374 11 місяців тому

      Rusty Cybertruck comes from metal dust in the air that sticks to the stainless Steel when wet. Like the other post says, use a Brillo or put a clear coating on Stainless.

    • @M13x13M
      @M13x13M 11 місяців тому

      Ha,Ha. I have a sailboat . Yes red spots show up but on the stain steel cleats etc but I will be long gone before they ever rust out. Go to an old junk yard, you can find stainless steel trim on 1930's car in perfect shape but the steel body car unrecognizable.

  • @janetrussell3288
    @janetrussell3288 11 місяців тому

    Great to see this getting some coverage. There’s also the UTS study on the benefits of combining green roofs and solar. The plants benefiting from the shade and the solar benefiting from the cooling provided by the plants evapotranspiration.
    But, in Australia at least, we really need to look at our urban planning rules through a climate lens. Australian cities and suburbs need 30% canopy cover to avoid local heating (the Urban Heat Island Effect) and most come nowhere near it. London has more green space than most Australian cities. Our minimum green space rules for blocks don’t allow for the required amount of canopy cover, and our streets, with overhead power, can’t be fully shaded even when trees reach maturity. This local heating affects energy use in a number of ways: more air-conditioning and less active travel: walking and riding.
    It also pushes the air temperatures above what our local native animal species can deal with, and into heat stress. It kills the most vulnerable of them such as fledglings. I wish we could plan kinder cities, shrink the footprint of our houses on the block to the old 1970s rules and plan streets that are greener. To cater for those who are unable or do not wish to maintain green space there are many examples of public green space such as the central square, or double the width of a standard nature strip green strip which might run down one side or even through the centre of the road and include a bike path. There’s some Australian examples of squares and strips in Keysborough opposite Garden World.

  • @nilslivetlanga9710
    @nilslivetlanga9710 11 місяців тому

    Sedum roofs work great. Have it at the office building where I work, if not from home. Also de parking lot is roofed with sedum on it. Keep it cool, you drive the best. 20 year old building, roof is still maintenance free, frost and drought resistant, depending on the season it flowers yellow, red or pinkish (depending on cultivars). Roof covering isn't exposed to the elements, benefits its longevity. What else is so beneficial?

  • @frenchydampier2209
    @frenchydampier2209 11 місяців тому

    The trade off is loss of solar capture to create the energy the building needs.
    A solar/battery set up could reduce/eliminate the buildings electrical load.

  • @tomquimby8669
    @tomquimby8669 11 місяців тому

    if you have a choice blue seems to be the best colour to resist DEW urban house clearing

  • @jbossnack
    @jbossnack 11 місяців тому +1

    they don't call it the rain forest for nothing

  • @rozonoemi9374
    @rozonoemi9374 11 місяців тому +4

    How does Green Roof do in winter time, with 3 feet of snow on roof?

    • @philiptaylor7902
      @philiptaylor7902 11 місяців тому

      Pretty well, they are good insulation. Plenty of clips of green roofs in Norway in the video 😂

  • @chrislj2890
    @chrislj2890 11 місяців тому

    Farmers cutting down trees to grow food is bad, but cutting down trees to install solar and wind turbines is good. Got it.

  • @DirkSmith-f4h
    @DirkSmith-f4h 11 місяців тому +7

    Okay, I’ll start ripping my solar panels off! What a farce …

  • @THE_MASK_REAL_ONE
    @THE_MASK_REAL_ONE 11 місяців тому

    I was in Brisbane and i noticed a new build house with a black roof .

    • @radart6037
      @radart6037 11 місяців тому +2

      Insane it’s a baffling trend to have dark roofs in new houses and no eaves in Australia. 🤷‍♂️

  • @Michael-yi4mc
    @Michael-yi4mc 11 місяців тому

    We could grow pot plants on the roof.

  • @Mauricio17-x1p
    @Mauricio17-x1p 11 місяців тому +4

    The lighter the surface the higher the reflection of short wave radiation out to space and the less absorption (heat) and its long wave radiation which does not escape the atmosphere....i.e the greenhouse effect.This can be seen inside your car when sunlight comes through windows striking dark seats and upholstery warms it and cannot escape. Inside the car is hotter than outside. This is why children cannot be left inside cars!!!..Especially in cities we need to urgently move to lighter coloured surfaces-roof and roads etc

    • @robertfonovic3551
      @robertfonovic3551 11 місяців тому +3

      And black cars where fashionable 10 to 12 years ago. I always questioned the owners intelligence when I saw one.

  • @JorgeLausell
    @JorgeLausell 11 місяців тому

    We've known this for decades.

  • @johnd01
    @johnd01 11 місяців тому

    What goes under the green?

  • @zaz4667
    @zaz4667 11 місяців тому +1

    Solar panels that absorb heat for roads would bring the temp down more!

    • @xiaoka
      @xiaoka 11 місяців тому +1

      Solar canopies over parking lot asphalt is more cost effective.

  • @scottmcshannon6821
    @scottmcshannon6821 11 місяців тому

    i was trying to figure out how green paint would help, i thought that would make things worse.

  • @frank33607
    @frank33607 11 місяців тому

    Also, remember not to use your a/c

  • @Michael-yi4mc
    @Michael-yi4mc 11 місяців тому

    Would you recommend green roof in a drought stricken city?

    • @darthsirrius
      @darthsirrius 11 місяців тому +1

      It's a bit of a double-edged sword in that case. Over time it would retain more moisture and by cooling the surrounding air it would make it more drought resistant in the future. But you would still have them initial problem of needing to feed it all that much more water.
      So it's like, make things worse in the short term to make things better in the long term.

  • @ydid687
    @ydid687 11 місяців тому +1

    Sir wise measures in life require collective intelligence and a triple digit iq
    Many have failed that eligibility criteria already for ever

    • @robertfonovic3551
      @robertfonovic3551 11 місяців тому

      Eh?

    • @ydid687
      @ydid687 11 місяців тому

      @@robertfonovic3551 the weather sure is nice today

  • @philiptaylor7902
    @philiptaylor7902 11 місяців тому

    Great video Sam.

  • @rozonoemi9374
    @rozonoemi9374 11 місяців тому

    What is best, Green Roof or Solar Panel?😯

    • @philiptaylor7902
      @philiptaylor7902 11 місяців тому +1

      Why choose, you can have both.

    • @janetrussell3288
      @janetrussell3288 11 місяців тому +2

      Might not be suited to residential roofs, but you can have both and they benefit each other. A Sydney project showed that the shading from the panels assisted the plants, especially those that prefer some shade. The cooling from the evapotranspiration from the plants also boosted the energy production from the panels.

  • @punditgi
    @punditgi 11 місяців тому +2

    Good idea!

  • @222INFINITY
    @222INFINITY 11 місяців тому +1

    This has been basic knowledge for decades. It's been proven that solar roofs are a bad investment, instead home owners should protect their home from the sun and invest in solar farms for power where the return on investment is far superior. All one has to do is look at the cost of Tesla power walls and solar install on a typical home, $150K to keep the lights on is a might steep investment!!!!!!

  • @rodneyblackwell7477
    @rodneyblackwell7477 11 місяців тому

    Just pray your roof doesn't leak because it will cost a lot to fix.

  • @khalifornication
    @khalifornication 11 місяців тому +2

    Great Research! Keep it Up! 🎉

  • @thomasendel7883
    @thomasendel7883 11 місяців тому

    Morning Mate

  • @daniel_trang
    @daniel_trang 11 місяців тому +1

    Global warming solved. ☺️

  • @xiaoka
    @xiaoka 11 місяців тому

    I wonder bang for your buck wise if you wouldn’t be better off just buying a lot of white paint and painting every roof top and parking lot white.

    • @CiaranMcHale
      @CiaranMcHale 11 місяців тому

      That would help. But Sam neglected to mention two other benefits of green roofs...
      First, flooding occurs more often in cities than in rural areas. This is because the 99% soil/vegetation coverage in rural areas can absorb a lot of rainfall. In contrast, cities tend to have relatively little soil/vegetation, so rainfall is directed into the sewer system, which can overflow, thus leading to diluted sewage overflowing into the streets. If a significant proportion of buildings had green roofs, then they would reduce the amount of rainfall that makes its way into the sewer system, thereby reducing the chances of flooding.
      Second, pitched roofs usually have roof tiles that can last many decades. In contrast, it is common for flat roofs to have a bitumen "felt" covering, and this type of covering can become cracked after 10 or 20 years from weathering (mainly UV rays in sunlight), and start to leak. If a flat roof is turned into a green roof, then the few inches/centimeters of soil and vegetation will protect the underlying roofing material from weathering, so the roof is likely to remain free from leaks for many decades.

  • @MrGMawson2438
    @MrGMawson2438 11 місяців тому

    Morning mate