“The heat-trapping nature of carbon dioxide and other gases was demonstrated in the mid-19th century… There is no question that increased levels of greenhouse gases must cause the Earth to warm in response.”

“Climate change affects social and environmental determinants of health – clean air, safe drinking water, sufficient food and secure shelter.”

“The overwhelming majority of climate scientists agree that human activities, especially the burning of fossil fuels are responsible for most of the climate change currently being observed.”

“Scientists know with virtual certainty that increasing greenhouse gas concentrations tend to warm the planet.”

“Climate change is one of the most important environmental issues of our time. Climate change is caused by the increase in concentrations of greenhouse gases in the atmosphere. These increases are primarily due to human activities such as the use of fossil fuels.”

“The rise in CO2 is unambiguously caused by human activity, principally fossil-fuel burning. This is clear from the numbers: We know how much fossil fuel is converted into CO2 each year and emitted into the atmosphere”

“Climate change is one of the most pervasive and threatening issues of our time, with far-reaching impacts in the twenty-first century.”

“CLIMATE CHANGE IS ONE OF THE DEFINING ISSUES OF OUR TIME. It is now more certain than ever, based on many lines of evidence, that humans are changing Earth’s climate”

“Humanity now faces two simultaneous existential threats,.. these major threats—nuclear weapons and climate change”

“Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Recent climate changes have had widespread impacts on human and natural systems.”