Throughout its history, the policies and objectives of the non-governmental environmental protection and conservation organization Greenpeace have been criticized by a number of groups, including national governments, members of industry, former Greenpeace members, scientists, political groups, and other environmentalists. The organization's methods, such as the use of direct action, have also led to controversy and legal action. Prominent critics Early Greenpeace member Patrick Moore, is a critic of the organization. Moore had once spoken out against nuclear power in 1976, but has since changed his stance to support it, along with renewable energy sources. In Australian newspaper The Age, he writes "Greenpeace is wrong — we must consider nuclear power". He argues that any realistic plan to reduce reliance on fossil fuels or greenhouse gas emissions need increased use of nuclear energy. Phil Radford, executive director of Greenpeace US responded that nuclear energy is too risky and takes too long to build to address climate change. Radford asserts that the U.S. can shift to nearly 100% renewable energy while phasing out nuclear power by 2050. As of 2021, 158 Nobel laureates signed a letter urging Greenpeace to end its opposition to genetically modified organisms (GMOs). The letter stated: "We urge Greenpeace and its supporters to re-examine the experience of farmers and consumers worldwide with crops and foods improved through biotechnology, recognize the findings of authoritative scientific bodies and regulatory agencies, and abandon their campaign against 'GMOs' in general and Golden rice in particular. Scientific and regulatory agencies around the world have repeatedly and consistently found crops and foods improved through biotechnology to be as safe as, if not safer than those derived from any other method of production. There has never been a single confirmed case of a negative health outcome for humans or animals from their consumption. Their environmental impacts have been shown repeatedly to be less damaging to the environment, and a boon to global biodiversity." Criticisms Internal party structure According to Wyn Grant, Greenpeace is a hierarchical and undemocratic organisation which allows very little control of its members over the campaigns the organisation embarks upon. For example, the criticisms Grant has given include: Greenpeace has a strictly bureaucratic and borderline authoritarian internal structure; a small group of individuals have control over the organisation in both international and local levels; local action groups are totally dependent on the central body; and the rank and file are excluded from