It has been accused of manipulating public opinion in a way that would be ordinarily be condemned (see double standard):
- Greenpeace has escaped public censure by hiding behind the mask of its “non-profit” status and its U.S. tax exemption. ... Forbes magazine once described it as “a skillfully managed business” with full command of “the tools of direct mail and image manipulation -- and tactics that would bring instant condemnation if practiced by a for-profit corporation.” 
Environmental groups like Greenpeace have boasted that they have blocked more than 200 hydroelectric projects in the developing world over the past two decades.
According to Public Interest Watch (PIW), Greenpeace Fund, Inc. a reputedly educational, public-interest-oriented 501(c)(3) directed $24 million in tax-exempt contributions into Greenpeace, Inc., non-exempt programs during tax years 1998, 1999 and 2000. According to the most recent tax returns available for both groups, in 1999, Greenpeace, Inc.'s total revenues equaled $14.2 million. Of this amount, $4.25 million, or 30 %, came from Greenpeace Fund. Greenpeace Inc. is a more directly political and activist unit, and as such is designated by the Internal Revenue Code as a 501 (c)(4). Mike Hardiman of PIW said "Greenpeace has devised a system for diverting tax-exempt funds and using them for non-exempt — and oftentimes illegal — purposes...It's a form of money laundering, plain and simple."
On January 30, 2003, some 30 Greenpeace demonstrators breached the central control building of the Sizewell B nuclear-power plant in Suffolk, England. Earlier in October 2002, approximately 150 Greenpeace protesters were arrested after penetrating the same facility. 
No New Nukes
Statement from Jan Beranek, Greenpeace International Nuclear Campaigner on July 16, 2007:
This fire and radioactive leakage reminds us yet again of the serious threats posed by nuclear power.... Nuclear power undermines the real solutions to climate change, by diverting resources away from the massive development of clean renewable energy sources the world urgently needs. 
Greenpeace is calling for global emissions to peak by 2020 and fall rapidly thereafter ensuring at least a 50 percent reduction from 1990 levels by the year 2050 globally, and eliminate fossil fuel emissions before the end of the 21st century. This platform is outlined in its ‘Global Energy Scenario’ which is available at: http://www.greenpeace.org/usa/press/reports/energy-r-evolution-a-bluepr
Rainbow Warrior Bombing
On 10th July, 1985 the Rainbow Warrior, flagship of Greenpeace, was destroyed in an Auckland harbour by high explosive devices that resulted in the death of Fernado Pereira, a crew member and photographer. An investigation into the bombing resulted in the arrest, trial and conviction of Major Alain Mafart and Captain Dominique Prieur of the French Armed Forces. After initial denials by the French President François Mitterrand, the French Prime Minister Laurent Fabius admitted that the French Secret Service ordered the attack in order to deny Greenpeace access to French territorial waters. Mafart and Prieur pleaded guilty to arson and manslaughter and were sentenced to ten years on the manslaughter charge and seven years on the arson charge. However, in an agreement between the French and New Zealand governments brokered by United Nations Secretary General, Mr Xavier Perez de Cuellar, the French government, while not apologizing, paid compensation to Greenpeace and the New Zealand government for this act of state-sponsored terrorism.  In return Mafart and Prieur were transferred in July 1986 to Hao atoll in French Polynesia to serve three years. However, in December 1987 Mafart was returned to France for treatment of a stomach condition, and in March 1988 was given a new appointment. Prieur and her husband, who was in charge of security at Hao atoll, were returned to France in May 1988.
- Seeing Greenpeace, Deroy Murdock, National Review Online, October 07, 2003.
- No New Nukes!
- Reaction to the fire at the Japanese nuclear power Kashiwazaki-Kariwa
- G8 to Act on Climate Change, Later... Maybe
- Bush's Global Warming Plan Isn't Good Enough
- Global Warming and Energy
- GLOBAL WARMING IMPACTS HIT POOREST, THE HARDEST AND WILL INCREASE IN SCOPE AND SEVERITY