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There are many scary claims about excess time on digital devices for children and teenagers. Here’s a guide to the real risks - and what to do about them

Climate models suggest that a possible scheme to cool the western US by making clouds brighter could work under current conditions, but may have severe unintended consequences in a future scenario

Learn how to answer Multiple Choice questions. Follow this proven strategy & discover key tips for a higher score. See examples from a real IELTS Reading test paper.

Visit http://TED.com to get our entire library of TED Talks, transcripts, translations, personalized Talk recommendations and more. Can we break bad habits by being more curious about them? Psychiatrist Judson Brewer studies the relationship between mindfulness and addiction — from smoking to overeating to all those other things we do even though we know they're bad for us. Learn more about the mechanism of habit development and discover a simple but profound tactic that might help you beat your next urge to smoke, snack or check a text while driving. The TED Talks channel features the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design -- plus science, business, global issues, the arts and more. You're welcome to link to or embed these videos, forward them to others and share these ideas with people you know. Follow TED on Twitter: http://twitter.com/TEDTalks Like TED on Facebook: http://facebook.com/TED Subscribe to our channel: http://youtube.com/TED TED's videos may be used for non-commercial purposes under a Creative Commons License, Attribution–Non Commercial–No Derivatives (or the CC BY – NC – ND 4.0 International) and in accordance with our TED Talks Usage Policy (

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