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Carbon dioxide emission footprint calculator and offset esti

作者:ihpa.net 发布时间:2017-10-11

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Carbon dioxide emissions calculator

This carbon dioxide emission calculator will help you gain an approximate idea of how many tons of carbon dioxide some of your activities generate and how many trees it would take to offset those emissions - free to use! Webmasters - get this script for your site.

Carbon calculator usage instructions

Enter the appropriate figures into the quantity column - all fields are optional. If you usually work in metric, there's also a handy conversion feature below.

The number of tons of CO2 emissions will be displayed in the right hand column of the carbon footprint calculator.

At the bottom of the form, the total estimated amount of carbon dioxide emissions will be displayed as an annual and monthly figure in short tons (1 short ton = 2000 pounds).

Below the emissions figures will be the estimated number of trees needed to offset those emissions both annually and monthly.

Explanatory notes are below the carbon calculator as to how those figures were obtained.

Need to convert from metric? 
Click here for handy pop-up converter.

 

Notes on CO2 emissions footprint calculator: 

The carbon footprint calculator is not designed to be 100% accurate as there are too many variables required in order to give a reliable emissions total. It is simply to give you an indication on how much carbon dioxide you generate and how many trees it would take to offset those emissions. 

Bear in mind that just about all we do in modern life produces a carbon footprint, well over and above what occurs in the natural world. For instance, the computer you are viewing this on was produced using processes that create carbon emissions.  Offsetting should be seen as a last resort; reduction in consumption is the first line of defense against global warming. 

Unlike many carbon footprint calculators available on the web, I thought I'd let people know how these figures are arrived at in my script. The calculations are based on the following:

Household electricity is based on a figure of 1.5 pounds of carbon emissions per kilowatt hour generated by a coal fired power station.3 Averages for USA based on Department of Energy, for Canada, the Ontario Ministry for Energy; for the UK, UK Environment Watch and for Australia, various state government environmental departments (averaged)
 

Natural gas emissions calculated on 0.12 pounds of carbon dioxide per cubic foot.5
 

Fuel oil based on 22.29 pounds CO2 emissions per gallon.5
 

Small car emissions calculated on .59 pounds emissions per passenger, per mile1
 

Medium car emissions calculations based on 1.1 pounds of carbon dioxide emissions per mile1
 

SUV/4 wheel drive carbon dioxide emissions based on 1.57 pounds per mile1
 

Air travel emissions based on Boeing 747 at average USA capacity and calculated per person1
 

Train travel calculations based on average occupancy of intercity train.1
 

Tree offset calculation is based on a tree planted in the humid tropics absorbing on average 50 pounds (22 kg) of carbon dioxide annually over 40 years2  - each tree will absorb 1 ton of CO2 over its lifetime; but as trees grow, they compete for resources and some may die or be destroyed - not all will achieve their full carbon sequestration potential. This calculator assumes that 5 trees should be planted to ensure that at least one lives to 40 years or that their combined sequestration equals 1 ton.
 

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