汽车尾气、露天焚烧、工业废水废气排放……面对城市乡村空气河道中的环境问题，想要让市民呼吸新鲜空气，看到碧水蓝天，科技手段和监测体系都需要跟上。

7月24日，记者从长沙市生态环境局获悉，全省首个、全国领先的水环境监测智能实验室和覆盖长沙市的11个颗粒物雷达监测点，正在为长沙的生态环境“护航”。

在许多城市，当你仰望城市夜空，看到过一束神秘绿光吗？这不是景观灯，更非外星人，这是一台环境监测设备。它通过应用大气颗粒物雷达探测技术，激光雷达可向大气中发射连续的脉冲激光，获取大气的后向散射信号，连续监测大气气溶胶的分布，分析气溶胶的组成结构和时空演变特征，识别颗粒物污染过程、沙尘污染过程等。（来源：三湘都市报）

Vehicle exhaust, open burning, industrial wastewater emissions...In the face of environmental problems in urban and rural air and rivers, if you want the public to breathe fresh air and see blue water and blue sky, scientific and technological means and monitoring systems need to keep up.

July 24th, the reporter learned from the Changsha City Bureau of Ecology and Environment, the province's first, the country's leading water environment monitoring intelligent laboratory and 11 particulate matter radar monitoring sites covering Changsha City. They are for Changsha's ecological environment “escort”.

In many cities, when you look up at night sky of city, have you ever seen a mysterious green light? It's not a landscape light nor an alien, it's an environmental monitoring device. Through the application of atmospheric particulate matter radar detection technology, whereby Lidar emits continuous pulses of laser light into the atmosphere. Obtain backscattering signals from the atmosphere, they continuously monitor the distribution of atmospheric aerosols, analyze the compositional structure and spatial and temporal evolutionary characteristics of aerosols, and identify particulate pollution processes, sand and dust pollution processes.（翻译：万姗姗）