If Donald Trump were elected president, he would be the only world leader who does not believe in climate change—or even in calling for action on global warming.That\u0026#039;s what the Sierra Club found in a comprehensive analysis of verifiable quotes, statements, and actions from global heads of state, released Tuesday, which also warns that the presumptive Republican nominee\u0026#039;s steadfast denial of climate science could threaten relationships between the U.S. and its allies.\u0022Donald Trump\u0026#039;s failure to acknowledge basic climate science wouldn\u0026#039;t just leave him isolated on the world stage as President, it would undermine our relationships with key allies and threaten our ability to work effectively internationally. Trump\u0026#039;s climate science denial would make him a global laughingstock if it wasn\u0026#039;t so dangerous,\u0022 said Sierra Club global climate policy director John Coequyt. \u0022Every single leader on earth—from Germany to India to Somalia to Japan—recognizes that the climate crisis is happening and demands the world\u0026#039;s attention, but Trump is sticking his head in the sand while the seas are rising.\u0022The report, On the Climate Crisis, It\u0026#039;s Donald Trump vs. the World (pdf), compiles official statements from 195 independent nations worldwide that recognize the dangers of global warming and the need to curb rising greenhouse gases, and compares them to the various ways in which Trump has dismissed, denied, and ridiculed the very concept.\u0022It is important that we act, because climate change is becoming an increasingly serious problem for all nations,\u0022 Japanese Prime Minister Shinzo Abe said last year.In comparison, Trump tweeted in 2014, \u0022Is our country still spending money on the GLOBAL WARMING HOAX?\u0022The U.S. and more than 170 other nations signed the Paris accord in April, committing to keeping global temperature rise to under 2°C.Canadian Prime Minister Justin Trudeau said at the time, \u0022Climate change will test our intelligence, our compassion and our will. But we are equal to that challenge. I encourage other signatories to move swiftly to follow through on their commitments.\u0022A month earlier, Trump attacked \u0022draconian climate rules\u0022 in an energy policy speech and said that as president he would \u0022cancel the Paris climate agreement and stop all payments of U.S. tax dollars to UN global warming programs.\u0022The list, the Sierra Club reports, goes on.Bolivian President Evo Morales said of the Paris agreement, \u0022The response to global warming is global democracy for life and for the Mother Earth. Let us choose to be clean and active today for the sake all of humanity, not toxic and reactive\u0026nbsp; tomorrow, against nature.\u0022German Chancellor Angela Merkel said, \u0022Ladies and gentlemen, ambitious, comprehensive, fair, and binding—a global climate agreement should and indeed must be all those things. This is a question of both ecological necessity and economic common sense. It is a question of intergenerational equity. It is a question of our humanity, and on it depends the future of the human race.\u0022Marshall Islands President Hilda Heine: \u0022No President wants one of their first acts in office to be to declare a state of disaster. But by becoming one of the first countries to ratify the Paris Agreement, we have shown our determination to continue to lead this fight from the front.\u0022And then there\u0026#039;s Trump. \u0022Let\u0026#039;s continue to destroy the competitiveness of our factories \u0026amp; manufacturing so we can fight mythical global warming,\u0022 he tweeted in 2012. \u0022We can\u0026#039;t destroy the competitiveness of our factories in order to prepare for nonexistent global warming.\u0022\u0022We should be focusing on beautiful, clean air \u0026amp; not on wasteful \u0026amp; very expensive GLOBAL WARMING bullshit!\u0022 he wrote again in 2013.UN Secretary-General Ban Ki-moon said that the Paris agreement signing marked \u0022a moment in history. Today you are signing a new covenant with the future.\u0022One that a Trump presidency would all but guarantee to ruin, Sierra Club said.\u0022Anybody who cares about the health of our communities and the safety of our planet needs to know that Donald Trump would be the only leader of any nation determined to let it burn, if elected,\u0022 the group\u0026#039;s political director Khalid Pitts concluded.