Hawaii Chapter of the Sierra Club
The Hawaii Chapter of the Sierra Club, a wonderful organization whose members work to save the earth and protect its wildlife. Their site has a wealth of information and helpful green resources.
http://www.sierraclubhawaii.com/

Hawaii Department of Land and Natural Resources
Hawaii Department of Land and Natural Resources protects and conserves the natural and cultural resources for future generations.
http://hawaii.gov/dlnr/

Hawaii Department of Health: Clean Air Branch
The Clean Air Branch works to monitor and regulate air quality while reducing pollution in metropolitan areas. They list a great deal of information regarding the air quality in Hawaii and the measures being taken to preserve and improve it.
http://hawaii.gov/health/environmental/environmental/air/cab/index.html

Heat Island Effect
The definition of heat island effect, its causes, how it effects us and what communities can do to reduce it according to the EPA.
http://www.epa.gov/hiri/

Hippyshopper
Hippershopper, produced by Shiny Media, is similar to other green product review blogs. However, this “guide to ethical consumerism” is a Nigel's green web award winner.
http://www.hippyshopper.com/

Home Depot Foundation for Healthy Homes
Home Depot's foundation which assists building affordable, efficient communities. This also discusses the Healthy Community Trees Program.
http://www.homedepotfoundation.org/

Home – Green Home Changes
Ways in which you can make your home greener and healthier for your family.
http://www.casalatina.com/go-green-en-casa-latina/being-kinder-to-our-planet-and-to-our-bottom-line-part-two/

Hybrid Vehicles
An online resource on how hybrid vehicles work, hybrids on the market and their performance.
http://www.howstuffworks.com/hybrid-car.htm

Hydroelectric Energy
This website provides a great overview on how hydroelectric energy works, advantages, disadvantages and even a detailed diagram.
http://www.webmutations.com/energy/reports/present/rephydro.html

Hydrofluorocarbons and Climate Changes
An article describing hydrofluorocarbons and how they affect climate changes.
http://energybusinessdaily.com/global-warming/role-of-hydrofluorocarbons-hfcs-in-climate-heating/