Group 1 - The core viewpoint of the article highlights the decline in natural gas futures prices in Europe, with ICE UK natural gas futures dropping by 1.39% to 80.950 pence per therm and TTF Dutch natural gas futures decreasing by 1.69% to €31.125 per megawatt-hour, despite a weekly increase of 0.40% [1] - The ICE EU carbon emission trading allowances also saw a decrease of 0.74%, priced at €79.58 per ton, although there was a weekly increase of 1.32% [1]

Group 1 - The core viewpoint of the news highlights the fluctuations in natural gas and carbon emission trading prices in Europe, indicating market volatility [1][2] Group 2 - ICE UK natural gas futures increased by 1.12%, reaching 81.200 pence per therm [1] - TTF benchmark Dutch natural gas futures rose by 1.77%, priced at 32.155 euros per megawatt hour [1] - ICE EU carbon emission trading allowances futures decreased by 0.56%, settling at 79.37 euros per ton [1]