1. Waste water renovation through soil percolation

   • Matt K. John

   OriginalPaper Pages: 3 - 10

2. Experimental studies on SO₂ injuries in higher plants III: Inhibitory effect of suite ion on ¹⁴ CO ₂ fixation

   • Hirofumi Tanaka
   • Toshiharu Takanashi
   • Michihiko Yatazawa

   OriginalPaper Pages: 11 - 16

3. Carbon monoxide in the earth's atmosphere

   • M. H. Bortner
   • R. H. Kummler
   • L. S. Jaffe

   OriginalPaper Pages: 17 - 52

4. Observations of water, air and soil pollution in Israel and vicinity from the ERTS-1 imagery

   • Joseph Otterman
   • Avihu Ginzburg
   • Yuri Mekler

   OriginalPaper Pages: 53 - 61

5. Lead and cadmium contamination in the area immediately surrounding a lead smelter

   • H. W. De Koning

   OriginalPaper Pages: 63 - 70

6. Blooms of an algophorous amoeba associated with anabaena in a fresh water lake

   • W. L. Cook
   • D. G. Ahearn
   • R. J. Reiber

   OriginalPaper Pages: 71 - 80

7. The Toronto heat island and pollution distribution

   • B. Padmanabhamurty
   • M. S. Hirt

   OriginalPaper Pages: 81 - 89

8. The cost and effectiveness of retrofit programs for used cars

   • Paul B. Downing

   OriginalPaper Pages: 91 - 105

9. Marine intertidal community responses to Kraft pulp mill effluent

   • J. Robin
   • E. Harger
   • Michael D. Nassichuk

   OriginalPaper Pages: 107 - 122

10. Book reviews

    • Robert E. Kohn
    • Robert A. Ragotzkie
    • Robert N. Varney

    BookReview Pages: 123 - 126

11. Announcements

    Announcement Pages: 127 - 132