Causes of Haze Assessment web is an online report that
answers questions about the chemical components that cause
regional haze, relationships of haze to meteorology, the
emissions that cause haze, and the effects of previous and
future emissions reductions on the poorest and best
The COHA website provides access to virtual reports to answer questions on the causes of haze at all
class I areas in the WRAP and CENRAP regions.
(Mouse-over the icons above for more info.)
Use the top navigation
bar for general information about the website.
Click on the button "COHA
Reports" to navigate to the main reports menu.
Use the left navigation
area to quickly navigate to the reports.
Learn about the Regional
Planning Organizations by following the "Partners" links.