What are Positive and negative effects of advancement of science and technology?

You can sum up both things in one Word: Knowledge.

Knowledge can either be good or bad, because there are some things that you would prefer to ignore, "ignorance is blessing". However, science has given men and nature more benefits than negative effects.

*Negative Effects:

-Deforestation

-Pollution

-Animal Suffering (in animal testing)

-Biological weapons

-Genetically altered foods

*Positive Effects:

-Cures to unknown diseases

-Better quality foods

-Better manufacturing processes

-Better understanding of the world

-Better communication (internet, fiber optics, etc)