Thanks to the University of Minnesota for sponsoring this video! http://twin-cities.umn.edu/ The technology we use to keep cool is heating the world in a vicious feedback cycle, so we need to improve it and use it less. Thanks also to our Patreon patrons https://www.patreon.com/MinuteEarth and our YouTube members. ________________________________________ To learn more, start your googling with this keyword:  Refrigerant - a substance used in air conditioners & refrigerators for its ability to change phases and transfer heat ___________________________________________ If you liked this week’s video, you might also like:  How AC changed the world: https://www.bbc.com/news/business-39735802People use AC to make their homes feel like Africa: http://bit.ly/2Y9fOH3 _________________________________________ Subscribe to MinuteEarth on YouTube: Support us on Patreon: And visit our website: https://www.minuteearth.com/ Say hello on Facebook: http://goo.gl/FpAvo6 And Twitter: http://goo.gl/Y1aWVC And download our videos on itunes:  https://goo.gl/sfwS6n ___________________________________________ Credits (and Twitter handles): Script Writer & Video Narrator: Alex Reich Video Illustrator: Arcadi Garcia Rius Video Director: Julián Gustavo Gómez With Contributions From: Henry Reich, Kate Yoshida, Ever Salazar, Peter Reich, David Goldenberg, Sarah Berman  Music by: Nathaniel Schroeder: ___________________________________________ References: European Commission. Climate-friendly alternatives to HFCs. https://ec.europa.eu/clima/policies/f-gas/alternatives_en Accessed May 2019.Gunawardena, K. R.,  et al. 2017. Utilising green and bluespace to mitigate urban heat island intensity. Science of the Total Environment, 584, 1040-1055. http://bit.ly/2GbBuHYGraves, R. Pers. comm. May 2019.International Energy Agency. 2017. Space cooling: More access, more comfort, less energy. https://www.iea.org International Energy Agency. 2018. The Future of Cooling: Opportunities for energy- efficient air conditioning. https://www.iea.org/futureofcooling/International Institute of Refrigeration. Nov 2017. The impact of the refrigeration sector on climate change. http://bit.ly/30A56XhKeeler, B. L., et al. 2019. Social-ecological and technological factors moderate the value of urban nature. Nature Sustainability, 2(1), 29. https://www.nature.com/articles/s41893-018-0202-1 Ministry of the Environment, Japan. 2016. Recovery, Recycling & Destruction of CFC, HCFC, & HFC. https://www.env.go.jp/en/earth/ozone/leaf2016/04.pdf Pakbaznia, E., & Pedram, M. 2009. Minimizing data center cooling and server power costs. In Proceedings of the 2009 ACM/IEEE international symposium on Low power electronics and design (pp. 145-150). http://bit.ly/2JDL5bNReardon, C. & Clarke, R. 2013. Passive cooling. Australian Government: Your Home. http://bit.ly/2LNMmj7Sachar, S., et al. 2018. Solving the Global Cooling Challenge: How to Counter the Climate Threat from Room Air Conditioners. Rocky Mountain Institute. www.rmi.org/insight/solving_the_global_cooling_challenge Sadineni, S. B., et al. 2011. Passive building energy savings: A review of building envelope components. Renewable and sustainable energy reviews, 15(8), 3617-3631. http://bit.ly/2G9uGecSivak, M. 2013. Air conditioning versus heating: climate control is more energy demanding in Minneapolis than in Miami. ERL, 8(1), 014050. http://bit.ly/2SbyOixZhang, X., & Caldeira, K. 2015. Time scales and ratios of climate forcing due to thermal versus carbon dioxide emissions from fossil fuels. GRL, 42(11), 4548-4555. http://bit.ly/2LS8id0Zhao, L., et al. 2015. Reduction of potential greenhouse gas emissions of room air-conditioner refrigerants: a life cycle carbon footprint analysis. Journal of Cleaner Production, 100, 262-268. https://doi.org/10.1016/j.jclepro.2015.03.063