Palestinian Tayseer Abu Dan checks the plants at his organic vegetable garden on the roof of his house, in the southern Gaza Strip city of Khan Younis, Feb. 17, 2021. Abu Dan turned his house roof into an organic vegetable garden to provide for his family, and he sells the surplus to the local market. (Photo by Khaled Omar/Xinhua)

Palestinian Tayseer Abu Dan checks the plants at his organic vegetable garden on the roof of his house, in the southern Gaza Strip city of Khan Younis, Feb. 17, 2021. Abu Dan turned his house roof into an organic vegetable garden to provide for his family, and he sells the surplus to the local market. (Photo by Khaled Omar/Xinhua)

Palestinian Tayseer Abu Dan checks the plants at his organic vegetable garden on the roof of his house, in the southern Gaza Strip city of Khan Younis, Feb. 17, 2021. Abu Dan turned his house roof into an organic vegetable garden to provide for his family, and he sells the surplus to the local market. (Photo by Khaled Omar/Xinhua)

Palestinian Tayseer Abu Dan checks the plants at his organic vegetable garden on the roof of his house, in the southern Gaza Strip city of Khan Younis, Feb. 17, 2021. Abu Dan turned his house roof into an organic vegetable garden to provide for his family, and he sells the surplus to the local market. (Photo by Khaled Omar/Xinhua)