Di dalam kampus Universitas Indonesia di Depok, Anda bisa menemukan kabut ini pada pagi hari. Apalagi setelah malamnya wilayah itu diguyur hujan. Bersepeda pagi di sana sungguh nyaman. Bayangkan suasana hijau di kanan kiri jalan, rimbunnya hutan dan pohon. Hirup udaranya...ahhh....dinginnnn....segar....semoga lingkungan UI selalu hijau lestari...Hiz
Fog Cleans Air PollutionAtmospheric Chemists Show Morning Fog Captures Particulate Matter June 1, 2005 — While it hassles commuters, morning mist removes a lot of airborne particles which are hazardous for people with respiratory health problems. The water droplets inside morning fog are of just the right size to collect and hold onto tiny air pollutant particles floating in the air. Once the fog settles back to the ground, it takes the air pollution particles with it. FORT COLLINS, Colo.--A dreary, foggy morning may wreak havoc on your morning commute. But now, scientists reveal that not all thick, foggy air is bad. Some of it may be helping to clean up our polluted skies. Commuting to work in the morning is already a long trek for Emilie Lorditch. But add in a blanket of thick, dense fog, and the drive worsens. "It can be really scary," she says. Atmospheric chemists say poor visibility and traffic tie-ups have given fog a bad rap. Now, new research shows fog is actually good at clearing up something bad -- dust and dirt particles in the air. "In the case where you have a fog-scavenging air pollution and the fog droplets being deposited to the ground, those pollutants are going with the droplets to the ground," atmospheric chemist Jeffrey Collett, Jr., of Colorado State University in Fort Collins, tells DBIS. Different kinds of fog appear across the country. But, the kind responsible for air pollution cleanup is called radiation fog. It occurs mostly in the morning. "Radiation fog forms when the atmosphere is very stable and the skies are clear," Collett says. "And so the ground tends to radiate heat away to the sky." On a clear night, heat from the ground radiates into space, leaving cool air just above the ground. Once the air reaches a specific temperature, water droplets form, surrounding pollution particles and creating radiation fog. When the sun comes up, it evaporates the water droplets, cleaning the particles out of the air, and leaving dirt and dust on the ground. Collett says, "The fogs remove a lot of airborne particles, which are problematic for especially people with respiratory health problems." How much pollution the fog can clean out of the air depends on the size of the pollution particles and the size of the water droplets within the fog. -- Two third (72%) urban Indonesians did not aware of global warming (source: Unfccc Bali). Stay informed. Join "PenaHijau" mailing list. Just send blank email to: [EMAIL PROTECTED]
