If they did not use a thermometer, then I doubt it has been "tested".
I can feel the difference between 80 degrees and 100.
You are talking of day to day temperature. Climate change is a result of global temperature increasing. I very much doubt NASA, amongst other climate observation centres, would have faulty equipment. I encourage you, and others, to continue researching the topic (although beware of bias and unsupported information) and maybe even come up with your own ways to try and help the issue - after all, we're all going to have to work together on this, being a worldwide problem. Let's just hope us humans put a solution into place before we've done too much more unreversible damage.
Is there anything we can observe for the sake of the definition of the word science?
I LIKE MANUAL TRANSMISSION AND MANUAL WINDOWS AND LEATHER SEATS. I GUESS I HAVE TO CUSTOMIZE TO GET THAT COMBINATION.