This is example email for announcing a challenge. This suggestion can be customized with details about prizes and related events and distributed to users of your site via built-in email tools or through a 3rd-party email system. 

Take the challenge!

Did you know that 33% of our company’s greenhouse gas emissions come from our commutes?  

This month, we’re challenging you to bring that number down by exploring other ways of commuting. By simply eliminating a few drive-alone trips throughout your week you can make a big difference while also being entered to win prizes along the way.  

Take the challenge and see firsthand what an empowering experience it is to make a quantifiable difference. Let's see how many pounds of CO2, gallons of gas, and dollars we can save when we work together. Register at [insert challenge URL here] to take the challenge!