Twitter has become a dynamic platform for social change, with just about every nonprofit and government agency tweeting information, tips, and actions for those interested in the world of social good. From organizations with huge backing to individuals with innovative ideas, here’s a list of 50 social good twitterers to follow, covering a wide range of causes:

@AdCouncil

Tweets about the latest social issues from the leading producer of public service advertisements since 1942.

@aym

Tweets to identify, connect and support youth activists from around the world who are using technology to organize social change.

@BeUnreasonable

Tweets about promoting “unreasonable” entrepreneurs, those taking a risk to promote social change, through mentorships and capital at a six-week intensive institute.

@Cars4Causes

Tweets from “The Charity That Gives to Charities,” they specialize in turning your vehicle into cash for the charity of your choice.

@CauseOfTheWeek

Submit your favorite cause through its website, with one highlighted through their tweets and social media each week.

@changemakers

Tweets on the latest in innovation, social entrepreneurship, and tips for making a difference, and becoming a changemaker.

@charitywater

Tweets from a nonprofit organization that promotes and facilitates bringing clean and safe drinking water to people in developing nations.

@childrensrights

The org that defends the lives and legal rights of abused and neglected children in foster care nationwide.

@dosomething

Tweets to inspire and help young people rock causes they care about, “Using the power of online to get teens to do good stuff offline.”

@echoinggreen

Tweets from an organization that has invested more than $30 million in seed funding in the innovative ideas of social entrepreneurs who are working to change the planet.

@Envirowire

Tweets about “enviro-politics” and news (not just Greenpeace related) from a Greenpeace promoter.

@food_democracy

Tweets from Dave Murphy, Founder & Director of Food Democracy Now! With tips and news about sustainable food and farm policies.

@gatesfoundation

Tweets from the Bill & Melinda Gates Foundation, providing strategic grants that promote global health and development, along with U.S. education.

@GirlUp

A UN Foundation campaign with the mission of “Uniting girls to change the world,” and tweets to inspire just that.

@GlobalFundWomen

Tweets from the largest global grant-maker “Promoting women’s economic security, health, education and leadership.”

@GlobalGiving

Highlighting 1,000+ projects in 100+ countries through tweets to inspire donations around the world.

@GreatNonprofits

Tweets from an organization that collects reviews on nonprofits, relaying the good and the not-so-good for honest feedback.

@HandsonNetwork

Tweets that provide people the support and inspiration to take action so that “every person will discover their power to make a difference, creating healthy communities and vibrant democracies around the world.”

@HumaneSociety

The Twitter feed from The Humane Society based in Washington, D.C., helping animals and confronting animal cruelty.

@idealist

Tweets from the two people that developed Idealist, a non-profit dedicated to helping people turn their good intentions to action.

@joinred

The organization designed to eliminate AIDS but bringing people and brands together to help fight AIDS in Africa.

@JoshViertel

Tweets from the president of Slow Food USA about the Slow Food movement, promoting “good, clean, fair food as a universal right.”

@Kiva

Tweets from the organization that connects loans to people in poverty, or “Loans that Change Lives.”

@LIVESTRONGCEO

Tweets from the cancer survivor and CEO of Livestrong, working to offer support and to improve the lives of those affected by cancer.

@michaelpollan

Tweets from the man who wrote the legendary bestseller The Omnivore’s Dilemma, along with other books about our food culture.

@mochaclub

A young generation of activists who are intent on giving up the cost of two mochas a month ($7) to fund relief and development projects in Africa.

@MTVact

MTV’s tweets intended to make it easy for everyone to take action, with a focus on celebrities taking action.

@NWF

Tweets to keep you up-to-date on the latest within the National Wildlife Federation that works to inspire Americans to protect wildlife for our children’s future.

@ObamaFoodorama

Tweets from Eddie Gehman Kohan, blogger and editor of ObamaFoodorama.com, about White House food initiatives.

@ONECampaign

Follow the tweets from ONE, a grassroots campaign of 2 million people committed to the fight against extreme poverty and preventable diseases.

@oxfamamerica

Tweets from the Oxfam peeps, working together to end global poverty and injustice.

@PATHtweets

Tweeting info and actionable ways to improve the health of people around the world by advancing technologies, strengthening systems, and encouraging healthy behaviors.

@PeaceCorps

Even if you can’t go yourself, these tweets from the official Peace Corps Twitterers allow you to see what’s going on around the world, without leaving your desk.

@PlanetGreen

Tweets of everyday inspiration and practical tips for how to live a greener lifestyle.

@poptech

Tweets from an organization that networks “world-changing, projects and ideas” along with extraordinary conferences.

@ProjectGive

A community service education program for middle school students based in Los Angeles, Calif., with tweets about inspirations to change the world, geared toward the younger generations.

@Refugees

From the folks at the Office of the United Nations High Commissioner for Refugees (UNHCR) with tweets related to their appeals for the protection of refugees and refugee problems worldwide.

@SavetheChildren

Tweets from the organization that creates lasting change for children affected by natural disasters, conflicts and ethnic violence in the U.S. and around the globe.

@socialactions

Tweets about people who are creating meaningful action, and ideas for how you can follow suit.

@socialgood

Comprehensive news and tweets about social good events, innovations and nonprofits.

@ted_com

Tweets from TED (Technology, Entertainment, Design), the organization that promoted “Riveting talks by remarkable people, free to the world.”

@thedailyfeats

Daily Feats tweets encouraging messages to inspire tweetees to do good things every day and to reach lifelong goals.

@TreeHugger

Tweets on the latest and greatest links, ideas and conversation about the modern green movement.

@unfoundation

Based in Washington, D.C., these are actionable tweets to connect people, ideas and resources with the United Nations.

@UN

The official twitter account of the United Nations, these tweets can help you stay on top of the latest UN affairs.

@ushahidi

Tweets from a non-profit tech company specializing in developing free and open source software to spread useful information and allow people to tell their stories.

@Water

Get tweets from the organization that works with communities to meet their own water & sanitation needs through microfinance solutions.

@WFPUSA

Tweets from the U.S. offices of the World Food Program (WFP) to build support in the U.S. for the global Program that fights world hunger.

@whitehouse

Tap into the nation’s ongoings and join in on the conversation through the official White House twitter account.

@WorktoLive

Tweets from an organization that spreads awareness about global occupational health issues.

Which social good twitterers do you follow?