The Virgin Earth Challenge is a prize of $25m for whoever can demonstrate to the judges' satisfaction a commercially viable design which results in the removal of anthropogenic, atmospheric greenhouse gases so as to contribute materially to the stability of Earth's climate.

Thank you to everyone who has sent in applications, this round of the Virgin Earth Challenge has now closed. The deadline for applications was on the 8th of January 2010. Any new entries which arrive after the closing date will be reviewed at our discretion.