Flexi Says: There is no longer any doubt that our planet is growing warmer, and that human actions are the primary cause. There is also no question that if we don’t do something about it soon, the consequences will be devastating. Of the 17 warmest years on record, 16 of them have occurred since the year 2000. While record-breaking years attract the most public attention, individual years are less significant than the overall trend, and the upward trend in Earth’s temperature is alarming. The average temperature of the planet has been rising for more than a century, and its rate of increase is accelerating. The most significant reason for Earth’s rising temperature is the human impact on the greenhouse effect.