At last, protest marches against global warming, the most relevant issue of our time (Report, 8 September). I am over 90 years old and cannot join one but wish I could. All other questions fade into second place: Brexit, the gap between rich and poor, even the wars of the Middle East. We are not even reaching the 2% per annum target and even 0.2% would be too high. We are faced with escalating catastophies: rising sea levels, floods, forest fires. I have had a long and happy life but what am I leaving my great-grandchildren? I feel impotent. No one seems to question the effects of jet aircraft, of rockets to outer space or the ever-escalating increase in traffic. As I carefully recycle my rubbish and take pride in my excellent compost heap, I realise how paltry my efforts are.
High Wycombe, Buckinghamshire
• Join the debate – firstname.lastname@example.org
• Read more Guardian letters – click here to visitgu.com/letters
• Do you have a photo you’d like to share with Guardian readers?Click here to upload itand we’ll publish the best submissions in the letters spread of our print edition