20 September 2011
- 07:2407:24, 20 September 2011 diff hist −1 Towel cooking No edit summary
- 07:1107:11, 20 September 2011 diff hist 0 Fireless cookers →Materials and Requirements
- 06:0206:02, 20 September 2011 diff hist 0 m How to cool homes during a heat wave →Creating a breeze
- 06:0006:00, 20 September 2011 diff hist +1 m Sun Frost energy efficient shower →sentence fragment and grammar