Scotland’s devolved parliament has decided not to go ahead with a tax cut for the aviation industry, because it has declared a climate emergency with Roseanna Cunningham, the SNP Scottish environment secretary, saying that to cut air passenger duty would be incompatible with its new pledge to cut Scotland’s carbon emissions to net zero by 2045. The UK managed to go for 114 hours without using any coal during the bank holiday weekend. Coal is only 5% of electrical energy production in the UK, so it’s not such a stretch, but it is the longest period so far. Cumulatively the National Grid has not used any coal for a total of 1,000 hours in 2019 a fall of around 65%…