★★★ The air was warm and unmoving. From the office roof, haze spread out below. Awning fabric held and channeled the smell of the respiration of hot vegetables out onto U上海龙凤 嘉定nion Square. A baby down in the subway had an electric fan clamped to the front bar of its stroller. The haze was wearying to walk in. Late in the day, the dinginess of it took on attractive colors. At sundown, pink light flooded high clouds in half of the west, while a lower cloud blocked the remainder.