Ottmar Georg Edenhofer (born in 8 July 1961 in Gangkofen, Lower Bavaria, Germany) is one of the world's leading experts on climate change policy, environmental and energy policy, and energy economics.
 Edenhofer currently holds the professorship of the Economics of Climate Change at the Technical University of Berlin.
 He is deputy director and chief economist of the Potsdam Institute for Climate Impact Research (PIK) as well as director of the Mercator Research Institute on Global Commons and Climate Change (MCC).
 From 2008 to 2015 he served as one of the co-chairs of the Intergovernmental Panel on Climate Change (IPCC) Working Group III "Mitigation of Climate Change".
Climate Change is the tenth studio album by rapper and songwriter Pitbull.
 It was released on March 17, 2017.
 through RCA Records, Polo Grounds Music and Mr. 305 Inc. It features Enrique Iglesias, Flo Rida, Jennifer Lopez and Jason Derulo.
Jason Joel Desrouleaux (] ; born September 21, 1989), known professionally as Jason Derulo (pronounced ; formerly stylised as Derülo), is an American singer, songwriter, and dancer.
 Since the start of his solo recording career in 2009, Derulo has sold over 30 million singles and has achieved eleven Platinum singles, including "Wiggle", "Talk Dirty", "In My Head", and "Whatcha Say".
Peter Sinclair from Midland, Michigan (born 1953), is an environmental activist whose focus is on climate change.
 He is a YouTube blogger, explorer and founder of the "ClimateCrocks.com" website.
 Together with climate researchers he's traveled to hot spots of climate change, for instance to Greenland as part of the Dark Snow Project.
 Sinclair is perhaps best known for producing the "Climate Denial Crock of the Week" series on his YouTube channel.
 Videos have received praise from climate scientists such as Gavin Schmidt, Michael E. Mann, and the late Stephen Schneider.
 In 2012, he launched another YouTube series, entitled "This is not Cool", for the Yale Project on Climate Change Communication.
Paul Ingrassia (born c. 1950) is a Pulitzer Prize-winning journalist and retired Managing Editor for Reuters, a division of Thomson Reuters, headquartered in New York City.
 In June 2016 he received the Lifetime Achievement Award from the Loeb Foundation for accomplishments in business and financial journalism.
 Ingrassia drew media attention in 2013 when David Fogarty, climate change reporter at Reuters for nearly 20 years, resigned and later told the press of Ingrassia's suspected climate change denial.
 Ingrassia had allegedly told Fogarty in 2012 that he was a 'climate change skeptic' who wanted to see more evidence mankind was changing the global climate.
 Following what Fogarty claims to be a time of heavy climate change censorship he described as a 'Climate of Fear' in Reuters, Ingrassia supposedly denounced climate change coverage in early 2013 and abolished Fogarty's role, triggering his resignation.
The Climate Change Science Program (CCSP) was the program responsible for coordinating and integrating research on global warming by U.S. government agencies from February 2002 to June 2009.
 Toward the end of that period, CCSP issued 21 separate climate assessment reports that addressed climate observations, changes in the atmosphere, expected climate change, impacts and adaptation, and risk management issues.
 Shortly after President Obama took office, the program's name was changed to U.S. Global Change Research Program (USGCRP) which was also the program's name before 2002.
 Nevertheless, the Obama Administration generally embraced the CCSP products as sound science providing a basis for climate policy.
 Because those reports were mostly issued after the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), and in some cases focused specifically on the United States, they were generally viewed within the United States as having an importance and scientific credibility comparable to the IPCC assessments for the first few years of the Obama Administration.
The People's Climate March (PCM) was a large-scale activist event to advocate global action against climate change, which took place on Sunday, September 21, 2014, in New York City, along with a series of companion actions worldwide, many of which also took the name People's Climate March.
 With an estimated 311,000 participants, the New York event was the largest climate change march in history.
 Described as "an invitation to change everything," the march was called in May 2014 by 350.
org, the environmental organization founded by writer/activist Bill McKibben, and it was endorsed by "over 1,500 organizations, including many international and national unions, churches, schools and community and environmental justice organizations."
 It was conceived as a response to (but "not" a protest against) the scheduled U.N. Climate Summit of world leaders to take place in New York City two days later, on September 23.
David William Titley is a professor of meteorology at Pennsylvania State University and the founding director of their Center for Solutions to Weather and Climate Risk.
 He was also NOAA's chief operating officer from 2012–2013.
 Before assuming these positions, he was a rear admiral in, and the chief oceanographer of, the U.S. Navy, in which he served for 32 years.
 Titley initiated the Navy's Task Force on Climate Change, and serves on the CNA Corporation's Military Advisory Board.
 He was formerly a climate change skeptic, but later changed his mind after looking at the evidence of what factors influence climate–which are, according to Titley, "what are the larger things doing – what is the ocean doing?
 What is the sun doing?
 And what's our atmosphere doing?"
 Since then, he has described climate change as "one of the driving forces in the 21st century" and said that it contributed to the 2011 Arab Spring.
The 2007 Bali Declaration by Climate Scientists was a statement signed by over 200 climate scientists advocating specific targets for greenhouse gas emissions for the 21st century.
 The statement was based on the United Nations Framework Convention on Climate Change Article 2 that committed signatories to the "...stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system" and on the science available in the Intergovernmental Panel on Climate Change Fourth Assessment report (IPCC AR4).
 The Bali Declaration was released to coincide with the 2007 United Nations Climate Change Conference which took place in Bali 3–15 December 2007.
Siegfried Fred Singer (born September 27, 1924) is an Austrian-born American physicist and emeritus professor of environmental science at the University of Virginia.
 Singer trained as an atmospheric physicist and is known for his work in space research, atmospheric pollution, rocket and satellite technology, his questioning of the link between UV-B and melanoma rates, and that between CFCs and stratospheric ozone loss, his public downplaying of the health risks of passive smoking, and as an advocate for climate change denial.
 He is the author or editor of several books including "Global Effects of Environmental Pollution" (1970), "The Ocean in Human Affairs" (1989), "Global Climate Change" (1989), "The Greenhouse Debate Continued" (1992), and "Hot Talk, Cold Science" (1997).
 He has also co-authored "" (2007) with Dennis Avery, and "Climate Change Reconsidered" (2009) with Craig Idso.

Question: Which of the singers featured in Climate Change was born in September 21, 1989?
Answer: Jason Derulo