Commentary: We tend to remember the way things were, not the way things are.
COMMENTARY: We'd all like to wake up one day and hear that someone has come up with the answer: someone can fix the climate problem without us having to lift a finger! We can carry on exactly as we were before, shuffling billions of tonnes of fossilised carbon into the atmosphere every year, cutting down rainforests, and eating our t-bone steaks, without a care, because someone found the switch that makes everything all right.
While we measure the amount of CO2 in the atmosphere in mere parts per million (ppm), this small amount has a substantial effect on the temperature at the surface of the Earth. The amount has now increased by 40% since the industrial revolution, leading directly to increased temperatures worldwide.