This letter written in 2070 describes a dystopian future where water has become extremely scarce due to environmental destruction. The writer recalls how things used to be greener and water was plentiful, but nobody listened to warnings about conserving resources. Now most rivers and lakes are dry, people are severely dehydrated, and life expectancy is only 35 years. The writer feels guilty for not doing more to protect the environment when they had the chance, and believes life on Earth will soon be impossible due to the irreversible damage that was done.