Current CO2 atmospheric concentrations are racing past 400ppm and climbing steadily- precise ice core samples going back 800,000 years show us a normal cycled trend of 180ppm low and 280ppm high.
2014 was the hottest year on record.. until 2015. However, 2016 was even hotter. In fact, globally every month of 2016 has been the hottest in recorded history. Globally 13 of the last 16 years have been the warmest years on record.
The build up of CO2 has caused mass extinction events in Earth history (Permian Mass Extinction)- 4 out of 5 of the largest mass extinction events on Earth involve the build up of greenhouse gases.
Human activities emit more then 60 times the amount of carbon dioxide released by volcanoes each year.
Obvious observations;
Ocean acidification
Sea level rise
Global temperature rise
Warming oceans
Glacial retreat
Record flooding
Record fires
Vanishing Arctic sea ice
Searing drought
Vast bleaching of the Great Barrier Reef
More intense weather (hurricanes, tornadoes, storms)
Just to name a few..Every reputable educational body and scientific institution on Earth backs the fact that man made climate change is real, happening and caused by human activity, even in the U.S.
Science denying republican congressman have taken in well over $75,000,000 over their careers from the oil industry and special interest groups to spread misinformation, propaganda and lies to the American people. In congress republicans have voted down every meaningful legislation ever put up to address global warming.
Thousands of scientific findings and conclusions from currently active climate scientists from around the world have had publications that have passed the peer-review process. An overwhelming majority of these publications support the reality of man made climate change.
Our current warming is clearly attributed to our carbon emissions. We can see this because of the change in carbon isotopes in the atmosphere, which shows a clear human origin. The warming of the past 100 plus years is clearly and unequivocally caused by man. There is not a major national scientific body in the world that disputes this.
Again.. This reality is supported by every major reputable scientific institution, just to name a few:
Nasa
Royal Academies for Science and the Arts of Belgium
Académie des Sciences, France
The geological society of America
Academy of the Royal Society of New Zealand
American chemical society
Accademia Nazionale dei Lincei, Italy
American association for the advancement of science
American geophysical union
International Arctic Science Committee
American medical association
American meteorological society
European Science Foundation
American physical society
German Academy of Natural Scientists Leopoldina
U.S. national academy sciences
Canadian Foundation for Climate and Atmospheric Sciences
U.S. Global change research program
International Research Institute for Climate and Society
Chinese Academy of Sciences
National Academy of Sciences, United States of America
British Antarctic Survey
Intergovernmental panel on climate change
... And literally hundreds of other highly reputable organizations from every corner of the planet, made up of thousands of climatologists which has resulted in an irrefutable collective consensus north of 95%... the debate has been over for awhile now, you missed it. Man made climate change is real, happening and caused by human activity.