Climate change tipping points are not just symbolic | Letters

This symbolic threshold (Carbon dioxide levels bring climate change into a ‘new era’, 25 October) is one of many very real tipping points the world will experience on a path of climate change due to human effects. The tipping points we should also be paying attention to are the mass extinctions, global warming, melting ice and complete habitat changes we are currently seeing worldwide. Soon we will recognise these not as symbolic thresholds but more as points of no return. The P