ALAN Sangster and Walter Attwood (Letters, April 1) are obviously sincere in their belief in global warming, but how do they get 195 countries to act and not burn fossil fuels?

The UK's greenhouse gas emissions are down for the sixth year in a row, so the UK plays its miniscule part at a cost of £8.6 billion a year. China, responsible for 30 per cent of global emissions will increase them until at least 2030. China is about to exploit, the largest shale gas reserves on the planet. Do the green brigade really believe that countries will leave cheap fossil fuels in the ground?

The combined promises of emission reductions made after the Paris agreement are only one-third of what scientists insist are essential.

The Intergovernmental Panel on Climate Change states that it would take a massive global effort to cap rising temperatures by 2100 at 2.0 degrees Celsius above pre-industrial levels but climate scientists have previously said that this was far too high and would lead to catastrophic warming.

Environmentalists need to cut out the green rhetoric. No goods with "made in China" labels, no cars, no flying, no foreign holidays. Talk is cheap: action requires personal sacrifices, but obviously not for other countries.

Clark Cross,

138 Springfield Road, Linlithgow.

ALAN Sangster and Walter Attwood are wrong when they claim that scientists have proven that humans are warming the planet.

Data from Rutgers University reveals that average northern hemisphere December snow cover, when comparing the periods 1966-1970 and 2014-1018, has increased from 44.06 to 44.13 million square km.

Data from National Oceanographic and Atmospheric Administration reveals that, when comparing the 20th to the 21st century to date, the average number of hurricanes to hit the continental US per decade has fallen from 16.9 to 16.5, and their intensity has fallen from category 2.1 to 1.9.

Data from National Snow and Ice Data Center reveals that, in a list of lowest maximum Arctic sea ice extent, 2019 had more Arctic sea ice than 2007 or 2006.

I'd like to hear the climate alarmists' excuses for these revelations.

Geoff Moore,

Braeface Park, Alness.

ALL of your correspondents on the subject of climate change (Letters, April 1) make valid arguments, but I have rarely, if ever, read anyone’s comments on the additional contribution from volcanic events. Right now there is the eruption of the volcano in Mexico and a few years ago the Icelandic event produced a large amount of gaseous emissions. Has this ever been quantified? I ask because at the time of the Mount St Helens eruption I remember reading that the matter being expelled had been calculated as being greater than all of the emissions created by the industrial revolution.

While I am totally on side regarding humanity’s contribution to global warming, it would be useful if one of your scientific readers could comment on this additional load on the environment.

Ian Gray,

Low Cottage, Croftamie.