Evidence

The planet’s average surface temperature has risen about 1c since 19th century and estimated to be 2.4c by the end of 21st century. Most of the warming occurred in the planet in the past 40 years, with the recent seven being warmest.

The ocean has absorbed much of more than .33c since 1969.

The global average sea level has risen by approx. 6 inches since 1901, due to the expansion of warmer ocean & to the addition of met waters from glaciers.

The atmospheric concentration of CO2 has increased by over 40%, methane by 150% & nitrous oxide by more than 20% in last few decades.

Arctic summer sea ice cover has shrunk dramatically in last five decades. Experiment shows green land lost an average 279 billion tons of ice per year b/w 1993 & 2019, while Antarctica lost 148 billion tons per year.