Scientists agree that the Climate has been disrupted due to human activities, such as the burning of fossil fuels, which traps heat in our atmosphere, causing temperatures to rise, repeatedly breaking heat records. Not only the air temperatures are rising, but oceans are becoming hotter killing marine life & disrupting currents, which also causes extreme weather events. These disruptions to previously "normal weather" patterns affect crops, lead to catastrophic climate fires, cause extreme rainfall/drought, melt glaciers, decimate bees which are needed to pollinate crops, destroy ocean populations, and more.
It is not just a matter of "let's turn up the AC" -- it is literally a matter of life and death.
If you'd like to read more about what climate change is, here's a simple guide published recently in the BBC.
Note: This photo was taken mid-morning, Sept 9, 2020 in the SF Bay Area. The sky remained orange all day from climate fires' smoke. This photo has not been altered.