UK: England's salmon stocks at lowest level on record

The article highlights a significant decline in the salmon population across the Thames, a trend also observed in countries such as Ireland, Iceland, Sweden, and Canada. The cause of this decline is attributed to factors like agricultural pollution, sedimentation, chemical runoff, migration barriers, water shortages, and climate change. The Environmental Agency (EA) and Natural England are advocating for cross-sector action to combat these issues and are also involved in international initiatives to investigate the cause of the stock declines. Despite the overall downward trend, there have been improvements in some rivers due to enhanced fish passage and improved water quality.