Fracking concerns must be listened to | Letters

As public health researchers we noted your article on fracking (Friends of the Earth ticked off over claims in anti-fracking leaflet, 4 January) and wish to highlight the following: fracking operations involve pumping millions of litres of water containing fracking fluids underground and a small percentage of wastewater contains returned fracking fluids. Estimates vary depending on geological conditions but recent research suggests typically 4-8%. It is well established in peer-reviewed studies and government reports that fracturing fluids and wastewater have contaminated ground and surface waters.

An early peer-reviewed study on chemicals in fracking fluids found 25% could cause cancer and mutations, 37% could affect the endocrine system, 40-50% could affect the brain/nervous system, kidneys, immune system and cardiovascular systems. More recent studies support these findings, including a systematic evaluation that examined 240 fracking substances and found evidence suggesting 43% were linked to reproductive toxicity and 40% to developmental toxicity.