Then just look at the measurements as they are telling a clear story. We are all about measurements here at ASR.
NASA is a global leader in studying Earth’s changing climate.
climate.nasa.gov
As of this writing:
Carbon Dioxide: 422 ppm (normal range 180-280 ppm)
Global Temperature: +1.1c since preindustrial era (average surface temperature increase—poles are warming 3-4x faster than the equator)
Arctic Sea Ice Minimum Extent: -12.2% per decade since 1979
Ice Sheets: -424 billion metric tons per year
Sea Level: +4 inches since January 1993
Ocean Warming: +345 zettajoules since 1955
This has many implications. The rapid warming of the arctic has disturbed the jet stream, causing the polar vortex to swirl out of control, putting the U.S. into a deep freeze and whipsaw temperature fluctuations several times over the last few years. Rain and drought patterns change. Rain falls less often but much harder. Droughts last longer. Crop production is disturbed. Coral reefs are being scorched and fish reproduction is in decline due to the warming oceans and their acidification from taking up mass quantities of CO2. We are currently witnessing a mass extinction of species on Earth. All that expensive oceanfront real estate battered by flooding will cost more than prevention. I could go on.