Are some of your household products killing insects and wildlife?

Dogs that have had flea treatment swim in rivers and lakes, where the chemicals wash off and kill wildlife. Photograph: Jayneboo Shropshire/Getty Images

Insect numbers are in freefall and most people know that pesticide use in agriculture is partly to blame.

But many domestic products including topical flea treatments for dogs, ant killer applications, washing-up liquid and herbicides can also contribute to the problem.