Do you believe in man-made global warming?

The key to making any judgements about "global warming" is understanding the difference between global climate and local climate. In simplest terms seasonal global temperatures are the average of all the individual local seasonal temperatures so for example some regions will see an increase in temperatures above average while others can experience a decrease - "Global warming" does not preclude local decreases in temperature.

There are two major mechanisms that affect the local climate in the North Atlantic - the atmospheric jet stream and the oceanic Gulf stream, both of which can result in decreases in average season temperatures in Eastern North America and North-Western Europe as a consequence of "Global Warming". For The Netherlands (and the UK) the major player here is the Gulf Stream that brings warm water across the Atlantic from the Gulf of Mexico that keeps local average land temperatures several degrees warmer than they would normally be for these northern countries. For example Calgary and Kiev are on the same latitude as De Bilt (and Cambridge) but experience far colder winters and less warmer summers than any city in Holland (or England). Anything that affects the North Atlantic ocean currents can have a marked effect on local climate that far exceeds any global average. 

For this reason it is better to refer to this as climate change rather than global warming. And it pretty much started during the first industrial revolution when there was a marked increase in the burning of fossil fuel but the effects of that on the atmosphere and global temperatures were only noticeable in the 1980s as these effects tend to follow a power-law (as do most things in physics).

What do you suggest then? Another conspiracy or a cover-up?