Login or sign up Lost password?
Login or sign up
This example (see photo above) is roughly 50 by 60 millimetres, but the same sort of pattern was also present on much larger stones. I went on holiday for two weeks and returned to find this ghostly impression of a spider on our toilet roll (see photo below), but no spider or spider body anywhere around. If I replace my old diesel car with a less polluting new petrol one, how long will it take for the reduced pollution of the new car to outweigh the increased pollution caused by the manufacture of the new car and the disposal of the old, assuming average usage?