I te marama o Hānuere o te tau 2010, ko Toronto te tāone tuatahi o Amerika Te Raki i tono kia tāutahia ngā tuanui matomato ki ngā whanaketanga arumoni, whare whakahaere, me ngā whare noho maha-whānau puta noa i te tāone. I te wiki e tū mai nei, ka whānuitia te whakaritenga kia pā ki ngā whanaketanga ahumahi hou.

He whakarāpopototanga noa iho, ko te "tuanui matomato" he tuanui kua whakatōngia ki ngā otaota. He maha ngā painga taiao ka puta mai i ngā tuanui matomato mā te whakaiti i te pānga o te motu wera o te tāone me te hiahia pūngao e pā ana, te mimiti i te wai ua i mua i te rerenga wai, te whakapai ake i te kounga o te hau, me te kawe mai i te taiao me te kanorau taiao ki ngā taiao tāone. I roto i te nuinga o ngā wā, ka taea hoki e te marea te pārekareka ki ngā tuanui matomato, pērā i te pāka.

Kei roto i tētahi ture ā-rohe ngā whakaritenga a Toronto e whakauru ana i ngā paerewa mō te wā e hiahiatia ai he tuanui matomato me ngā āhuatanga e hiahiatia ana i roto i te hoahoa. I te nuinga o te wā, kāore e whakaaetia ngā whare noho me ngā whare arumoni iti ake (pērā i ngā whare noho iti iho i te ono papa te teitei); mai i reira, ko te nui ake o te whare, ko te nui ake o te wāhanga otaota o te tuanui. Mō ngā whare nui rawa atu, me 60 ōrau o te wāhi e wātea ana i runga i te tuanui me tipu.

Mō ngā whare ahumahi, kāore i te tino uaua ngā whakaritenga. Ka hiahiatia e te ture ā-rohe kia hipokina te 10 ōrau o te wāhi tuanui e wātea ana mō ngā whare ahumahi hou, ki te kore te whare e whakamahi i ngā rauemi tuanui matao mō te 100 ōrau o te wāhi tuanui e wātea ana, ā, he nui ngā tikanga pupuri wai ua hei hopu i te 50 ōrau o te ua ā-tau (ko te rima mm tuatahi rānei mai i ia ua) i te papaanga. Mō ngā whare katoa, ka taea te tono kia rerekē te tutuki i ngā whakaritenga (hei tauira, te kapi i tētahi wāhi tuanui iti ake me ngā otaota) mēnā ka haere tahi me ngā utu (e pā ana ki te rahi o te whare) e whakangaohia ana ki ngā whakatenatena mō te whanaketanga tuanui matomato i waenga i ngā kaipupuri whare o nāianei. Me whakaae ngā rerekētanga e te Kaunihera o te Tāone.

I te ngahuru whakamutunga, i roto i tētahi panuitanga pāpāho, i pānuitia e te rōpū ahumahi Green Roofs for Healthy Cities, kua puta kē ngā whakaritenga tuanui matomato o Toronto i te neke atu i te 1.2 miriona putu tapawha (113,300 mita tapawha) o ngā wāhi matomato hou kua whakamaheretia mō ngā whanaketanga arumoni, umanga, me ngā whare noho maha-whānau i roto i te tāone. E ai ki te rōpū, ko ngā painga ka uru atu ki te neke atu i te 125 ngā mahi wā-katoa e pā ana ki te hanga, te hoahoa, te tāutanga me te tiaki i ngā tuanui; te whakaiti i te neke atu i te 435,000 putu whatianga o te wai ua (e ranea ana hei whakakī i te 50 puna kaukau rahi-Olimipia) ia tau; me te penapena pūngao ā-tau neke atu i te 1.5 miriona KWH mō ngā kaipupuri whare. Ka roa ake te whai mana o te kaupapa, ka nui ake ngā painga.

I hangaia te whakaahua triptych i runga ake nei e ngā ākonga o Te Whare Wānanga o Toronto hei whakaatu i ngā huringa ka puta mai i ngā tau tekau o te ahunga whakamua i raro i ngā whakaritenga a te tāone. I mua i te ture ā-rohe, ko Toronto te tuarua o ngā tāone o Amerika Te Raki (whai muri i a Chicago) mō te nui o te tuanui matomato kua hipokina. Ko ētahi atu whakaahua e haere tahi ana me tēnei pou (nekehia tō pehu ki runga ake mō ētahi atu taipitopito) e whakaatu ana i ngā tuanui matomato i runga i ngā whare o Toronto, tae atu ki tētahi kaupapa whakaaturanga e wātea ana ki te marea i runga i te tūāpapa o te Whare Kaunihera.