I have this really exciting tool to help you calculate the impact of your travelling on the environment, and I thought it might fit in well with your interests. Though we love to travel, carbon emissions are an issue that is starting to worry a lot of us. The Flight CO2 Calculator will hopefully encourage us all to be more socially responsible by perhaps considering greener travel options.
If you are interested, take a look at http://www.tripbase.com/flight-Co2-calculator. It would be great if you could post the calculator on your blog. I really think it would add value to your site as a whole by sparking awareness, interest and debate from your followers. I hope you like it!

Many thanks ,

Anna