Ecological Surprises
Do you believe the beneficial effects of spraying pesticides on Sabah outweighed the resulting unexpected and harmful effects? Explain.
Check out page 173 of this online book:
http://books.google.com/books?id=4TKbgXeK8LIC&pg=PA173&lpg=PA173&dq=pesticides+sabah&source=web&ots=eU1jdf4HCw&sig=NI5y1ST-nKTX7DkyZzPkAaRL0eE#PPA173,M1
Look for the inset titled "Ecological surprises"
You will find not only the question you just asked, but material for the answer.