John Meech (Letters, April 4) is wrong in assuming that anyone who does not agree with anthropogenic global warming is by definition unscientific and closed-minded. Roderick Taylor and I are both university educated applied scientists holding the highest professional technical qualifications.

I do not select information to suit the argument. All of the data comes from established scientific records. There is no scientific proof that manmade CO2 is the sole cause of climate change whether the climate is cooling or warming. There is certainly no proven link between extreme weather events and increasing levels of CO2 in the atmosphere.

Over half of the CO2 that becomes resident in the atmosphere annually comes from the outgassing from the oceans. Less than 3.5 per cent is derived from burning fossil fuels. CO2 is the weakest of all the greenhouse gases.

Since 1979, global temperature data has come from satellites. Since 1998 there has been no increase in the global mean temperature; in fact there has been a small decrease. There has been no global warming. Yet global CO2 levels have continued to rise steadily. The fastest rate of global warming occurred from about 1685 to 1715 as the planet emerged from the “little ice age”. This was a time before the industrial revolution, when there were no coal-fired power stations, gas-guzzling 4x4s and the global population was less than 1bn.

There are no temperature records before 1659 so we cannot accurately judge the rate of cooling and warming caused by a constantly varying global climate. However, other data from tree rings etc confirm that in the last 2,000 years there have been at least two cold periods and two warm periods, both warmer than today’s climate. Unfortunately, warmists are eager to embrace the “subjectivity” of the future and too often have a “cultural aversion to learning from the past”. — Anthony Weeden, Bockmer End, Nr. Marlow