Talk about the benefits of rain.

Benefits: Water circulation, from the sea → high mountain area → back to the sea, in which energy circulation and material circulation are realized (overview). When water rises from the sea surface, the evaporation process is endothermic, which reduces the climate temperature in coastal areas; When moving to high mountains, water vapor will form raindrops with small solid particles such as dust as the core, thus purifying the air and realizing the water supply on the surface; The specific heat of water is relatively large, which is beneficial to adjust the local temperature difference, so it generally feels cooler after rain; Water is the foundation of all things, which is conducive to the growth of living things and the greening of the environment. For example, the desert in the north needs water urgently to improve the environment. Precipitation regulates the dry humidity of air, which has an important impact on human health; Snow is a part of precipitation, snowflakes are pleasing to the eye, and they can also kill pests, so there is a saying that "snow is auspicious for a bumper year".

Harm: precipitation and sun exposure will weather rocks and destroy large-scale ancient cultural relics buildings, such as the Forbidden City in Beijing; The purification of water will dissolve carbon dioxide, sulfur dioxide and sulfur trioxide in the air to form acid rain, which will destroy the environment and biology; Large-scale precipitation caused by typhoon will lead to geological disasters such as mountain torrents and landslides; Destroy soil.