Summarize Written Text — practice #swt-007

As the world's cities expand, they face a stubborn and worsening problem known as the urban heat island effect. Dense concentrations of concrete, asphalt, and brick absorb solar radiation throughout the day and release it slowly at night, keeping built-up areas significantly warmer than the surrounding countryside. The difference can reach several degrees, and in summer it transforms uncomfortable heat into a genuine threat to public health, particularly for the elderly and those without access to cooling. The problem also drives up energy demand, as residents run air conditioners harder, which in turn generates more waste heat and emissions, deepening the cycle. Urban planners have begun experimenting with a range of remedies, many of them surprisingly simple. Planting trees along streets and in parks provides shade and cools the air through the natural evaporation of water from leaves. Coating rooftops and pavements in light, reflective colours bounces sunlight away rather than absorbing it, lowering surface temperatures considerably. Some cities have gone further, installing gardens on rooftops or directing water through channels and fountains to take advantage of evaporative cooling. Studies suggest that these measures, applied together across a neighbourhood, can meaningfully reduce local temperatures and cut the energy needed for cooling. The benefits extend beyond comfort, since cooler cities suffer fewer heat-related illnesses and produce lower emissions. Critics caution that such interventions require sustained investment and careful maintenance, and that they cannot by themselves offset the larger warming driven by climate change. Nevertheless, advocates argue that greening and reflecting are among the few tools available that improve daily life immediately while also contributing, however modestly, to broader environmental goals shared across the planet today.