Have burning questions about Earth's changing climate? Wonder how scientists differentiate human impact from natural causes? Now's your chance to ask a NASA climate scientist

Have burning questions about Earth's changing climate? Wonder how scientists differentiate human impact from natural causes? Now's your chance to ask a NASA climate scientist directly.

Submit your question by recording a 10-15 second video and uploading it to YouTube, or simply post it on Twitter. Ensure you tag your submission with #askclimate so we can find it.

NASA scientists will record video responses to selected questions, which will be posted on the NASAExplorer YouTube channel.

"Living For A Cause" is a web series presented by Kumi Naidoo, Greenpeace International Executive Director. After three years at the helm, Kumi provides an insider's look at Greenpeace today,

"Living For A Cause" is a web series presented by Kumi Naidoo, Greenpeace International Executive Director. After three years at the helm, Kumi provides an insider's look at Greenpeace today, revealing surprising aspects from its well-known protests to its dedicated people and volunteers. Watch the series here.

In episode one, Kumi reflects on his initial contact with Greenpeace and emphasizes the need for greater participation in activism.

Follow Kumi Naidoo on Facebook and Twitter.

At the World Economic Forum in Davos, Dr. Jim Yong Kim, 12th President of the World Bank Group,

At the World Economic Forum in Davos, Dr. Jim Yong Kim, 12th President of the World Bank Group, highlighted income inequality and the urgent need to close the gap between rich and poor. He stressed that a serious plan is essential to address this global challenge.

The World Bank offers a smart plan of action. Watch their video from Davos, published on January 23, 2014, to hear their recommendations.

At the ECO:comics conference in Santa Barbara, Calif., Nicholas K. Akins, Chairman, President, and CEO of American Electric Power (AEP), discussed his company's clean coal technology initiatives

At the ECO:comics conference in Santa Barbara, Calif., Nicholas K. Akins, Chairman, President, and CEO of American Electric Power (AEP), discussed his company's clean coal technology initiatives and the hurdles faced. This discussion was published on April 3, 2014.

The presentation, titled "ECO:nomics: When Will We Get to Clean Coal?", is available from the WSJDigitalNetwork on YouTube.

Aisha Sani Abdullahi faced early blindness and child labor in Kano, Nigeria, but a chance encounter transformed her life. "Aisha's Song" is an uplifting film beautifully depicting her story of

Aisha Sani Abdullahi faced early blindness and child labor in Kano, Nigeria, but a chance encounter transformed her life. "Aisha's Song" is an uplifting film beautifully depicting her story of female empowerment in a region where women are often overlooked.

The film was made by Grain Media for Girl Hub, a strategic collaboration between the UK's Department for International Development (DFID) and the Nike Foundation.

Girl Hub empowers adolescent girls in poverty, unleashing their potential to end poverty for themselves, their families, and communities. Visit their site to learn more about the film's core issues.

Former President Bill Clinton (SFS'68) spoke at Georgetown's Gaston Hall, urging private citizens to contribute to the public good. He asserted that 21st-century citizenship requires "every

Former President Bill Clinton (SFS'68) spoke at Georgetown's Gaston Hall, urging private citizens to contribute to the public good. He asserted that 21st-century citizenship requires "every thoughtful person to try to do some public good."

Clinton warned of an "unsustainable path to the future," citing widespread "inequality and unsustainability." He concluded by advising, "If you want to serve you must begin with the stories." This address was published on May 2, 2013.