Its cycles, and it depends when you start the measurements from. If you start measuring 38 years ago, then there is no change in temperature. If you start in 1850 then were warmer by 0.7C. From middle ages, were colder by 4C. From the times of the Vikings we have warming, and from times of Jesus we have cooling down. Cycles. Money also has cycles. In the past (i know of examples in the 70s) money was made on the fear of The New Ice Age, and today its the fear of Global Warming.