This week, 10:10ers are all about cool carbon-friendly summers; from air con alternatives to sustainable travel and solar energy, there's no shortage of ideas on how to make this a great 10:10 summer. 

• Arianna from Italy shares her tips on how to keep the air con off and still stay cool.
• Iona's take on this topic is to ditch the shirt and tie and ask your boss to relax your dress code on those stunning summer days. 

• The University of Amsterdam's 10:10 Guerrillas shared their energy saving tips this week via a fab new video. Don't forget to join their Facebook group and download their very own 10:10 checklist for students and university staff. 

• Own or work for a business in the UK? Harriet shares 10 reasons why supporting greenhouse gas reporting is a smart idea.
• Meanwhile, Amsterdam is getting ready for the Gay Pride parade on August 6th. It'll be opened by electric boat - a first for pride - with the 10:10 crew on board! 
• Have you got a summer holiday coming up? Check out the Dutch team's tips for sustainable travel and tourism as well as advice from 10:10 Mediterranean. 
• The 10:10 team in London has started logging miles as part of Transport for London's Cycle Challenge. Why don't you and your friends, colleagues or family join in? Check out how, via on My 10:10.

• 10 tips to make the most of the sweet summer, courtesy of 10:10 supporter Milieucentraal in the Netherlands. More news from 10:10 Netherlands in their latest mailout. 
• 10:10 Denmark is getting ready to celebrate the end of their first year running the Danish campaign and have invited everyone to a celebration-cum-planning meeting on September 21st in Copenhagen.
• For many of us, summer holidays mean postcards! The Danish team opted for the electronic alternative this year and shared an e-postcard from Uganda where Carolyn describes the effects of climate change on her country as well as the action plan to limit further damage.
• More news from the Danish team can be found in their latest mailout.
• 10:10 Germany welcomed sign up "friendfund" on board this week. The Berlin based start up simplifies crowdfunding and reduces waste while keeping their own emissions down using Skype and document sharing.
• It's festival time for 10:10ers in Romania: the B'estfest crew is rocking Bucharest from 1st-3rd of July. Check out the 10:10 stand (right next to the UN stand).