Michael Crichton is a novelist.   The people who have made climate change political are the industrialists - oil, gas, and coal interests, who have profit margins at stake in the game of convincing the American public that it is a hoax.   All you have to do is follow the money trail.   Ninety-nine percent of climate scientists (not novelists) across the globe have formed a consensus backed by brutal peer review based on evidence that the climate is now changing due to the burning of fossil fuels and agriculture brought on by human civilization and spiked by the industrial revolution.   The  measurements  taken from ice cores and sea floor mud cores that record hundreds of thousands to millions of years of climate changes as well as attendant atmospheric composition tell us that today's phenomenon is directly human-caused.   When science changes it's mind it's known as "learning."   Opinions and belief don't mean diddly in the face of hard evidence.