This article points out the difference between short-term and long-term trends, a point that is often lost to climate change deniers.
This is a brilliant example of the worrisome practice of picking and choosing your data and trends to suit your preconceptions. No doubt it’s been carried out by many a fossil fuel lobby, with the largest oil and coal industry leaders by now so used to this process it’s like second nature to them.
What it does highlight however is some of the major problems that trendline statistics can garner; any one section of point of data can easily skew the trend in a completely new way, and taking a trend of the entire set is not always the best option (although in this case it most certainly is), so caution has to be taken.
Believe me, I’ve come across these issues in my dissertation this year, and they’re real head-scratchers sometimes!