Prominent global leaders and public figures have reiterated the critical threat posed by climate change to humanity. U.S. President Joe Biden described climate change as the 'number one issue facing humanity.' Former President Barack Obama called it the greatest threat to future generations. Hillary Clinton emphasized the urgency of climate change, highlighting its risks to the economy, national security, and public health. Environmental advocate Leonardo DiCaprio stated that climate change is the most urgent threat facing the human species. Former Vice President Al Gore, speaking at the World Health Organization's 77th World Health Assembly, warned that the climate crisis is the biggest health threat to humanity and stressed the dangers of continued pollution of the atmosphere. John Kerry highlighted projections that the Arctic could be ice-free in the summer of 2013 and underscored climate change as a threat to global stability and American national security, calling for transformation of the international financial system to meet climate goals. Former British Prime Minister Tony Blair described climate change as the greatest long-term challenge for humanity and cautioned against ignoring its dangers. In contrast, some voices remain skeptical, with Tom Fitton labeling climate change as a fraud. These statements reflect ongoing global concern about climate change's multifaceted impacts on health, security, and the environment.