People often talk of using newspaper and peastraw as a mulch in an organic garden. What effect on the organic balance of the environment does newspaper have? Also, is it absolutely essential that the peastraw come from an organic source or can a healthy soil rich in micro-organisms take care of it.
Newspaper is mainly carbon material, as long as it is not worked into the soil it will not rob Nitrogen from plants. As a mulch it will be fine and will help improve soil structure.
Most newspapers are printed with vegetable based ink, however do avoid coloured and glossy paper (heavy metals and bleaches).
Pea straw can be contaminated with Herbicide residues (and other pesticides). Even after composting the pea straw some herbicides remain still active and can do some damage.
Try and get unsprayed (no pesticides, no herbicides) or organic pea straw.