Climate change: Greenhouse gas emissions must peak by 2025, deep cuts needed by end of decade to avoid catastrophic impact, says UN panel

• Even if 2 degrees of warming is to be achieved, reaching peak emissions by 2025, reducing them by a quarter by 2030 and achieving net zero by 2070 will be necessary
• The use of solar and wind energy and batteries has surged since 2010, thanks to technology that reduced installation costs by up to 85 per cent